Претрага

Упит dcterms_subject_txt:Earth-Surface Processes,Geology

1150 items

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje
    ... of mine waters Discharge of untreated waste process water Occupation of large tracts of land Increasing the surface area of permanently destroyed area A3 Increasing the surface area of the buried humus layer Emissions of heavy metals into the surrounding land Disposal of tailings, ash and ...
    ... treatment of mine waters Discharge of untreated waste process water Occupation of large tracts of land Increasing the surface area of permanently destroyed area A3Increasing the surface area of the buried humus layer Emissions of heavy metals into the surrounding land Disposal of tailings, ash and slag ...
    ... Influence of Metal Ores Surface Extraction to Environmental Factors of the Environment; Faculty of Engineering, Department for mining engineering, University of Belgrade: Bor, Serbia, 1998. 8. Nikolic, J.M. Indicators of Sustainable Thermal Energy Systems Based on Coal Surface Mines. Master’s Thesis ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... Ranka Stanković University of Belgrade, Faculty of Mining and Geology Đušina 7, 11000 Belgrade ranka.stankovic@rgf.bg.ac.rs +381113219212 Ranka Stanković is associate professor at University of Belgrade, Faculty of Mining and Geology, where she is teaching several courses related to informatics ...
    ... can also be very time-consuming and expensive 2. One of many mechanisms for creating roles for students as active participants in educational processes is provided by the principle of allowing adaptation of materials. Students learn best not by merely passively reading and absorbing, but by doing ...
    ... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... direction and j in a circular direction. Each of the five commonly used methods (GL, ESP, SRP, HP, PCP) defines a specific surface that is standard. The level of overlapping the surface, which represents the result for the new well and some of the standard surfaces, represents the level of applicability ...
    ... direction and j in a circular direction. Each of the five commonly used methods (GL, ESP, SRP, HP, PCP) defines a specific surface that is standard. The level of overlapping the surface, which represents the result for the new well and some of the standard surfaces, represents the level of applicability ...
    ... their center of mass with standard deviation. The first presented method gives results in percentage of surface overlapping for 5 oil exploitation method in comparison with new well resulting surface. The second method gives results that involves the center of mass (weighted mean of maximum) and Energies ...

  • Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije

    Jana S. Stojković (2013-09-25)
    Mineralne vode još od davnina privlače pažnju ljudi i to kako u pogledu istraživanja iproučavanja, tako i u pogledu njihovog iskorišćavanja. Naročito je važno poznavanjesadržaja mikroelemenata u njima, jer su to komponente njihovog hemijskog sastavakoje ih odvajaju od tzv. „običnih“ malomineralizovanih voda.U ovom radu proučavani su odabrani esencijalni mikroelementi (fluor, bor, litijum,kalijum, stroncijum i silicijum), u mineralnim vodama Srbije, pri čemu je analiziranopreko 130 uzoraka mineralnih voda iz različitih geoloških sredina, to jest hidrogeološkihrejona. Cilj ovog istraživanja bio je ...
    esencijalni mikroelementi, faktori migracije, zakonomernosti rasprostranjenja, hidrogeohemijski procesi, multivarijantna statistička analiza, mineralne vode Srbije
    ... silica minerals and also on silicate minerals rich in fluorine and lithium. The mechanism of these processes has been studied on the chosen mineral water samples, in addition to analyzing how these processes are influenced by lithological and mineralogical structure of aquifer. Using the cluster ...
    ... “Fluoride enrichment mechanism and geospatial distribution in the volcanic aquifers of the Middle Awash basin, Northern Main Ethiopian Rift.” African Earth Sciences 60, No. 5, Elsevier, Pp. 315-327. 42. Горбов, А. Ф. (1976) Геохимия бора. Ленинград: Недра. 43. Grubbs, F. E. (1969) “Procedures for detecting ...
    ... types of aquifers and from different hydrogeological units, have been analyzed. The aim of this research was to point out the main hydrochemical processes which effect water migration of these microelements and their mobilization from the rocks. Besides that, hydrochemical conditions (especially chemical ...

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica
    ... Acta Cryst. (2021). B77, 584–593 Received 31 January 2021 Accepted 10 June 2021 Edited by P. Bordet, Institut Néel, France Keywords: alkali rare-earth silicates; phase transition; magnetic properties; crystal field splitting; lanthanide silicates. CCDC references: 1774871; 2089284 Supporting i ...
    ... projections of their angular momentum on the direction of the magnetic field. 1. Introduction Awide range of optical and magnetic properties of rare-earth elements (REE), their alloys and compounds makes them very interesting materials for different applications. In recent decades, many studies have ...
    ... P63/m to P63. Notably, the pressure- induced phase transition in these apatite compounds is a reversible process. For potassium-containing rare-earth disilicates two struc- ture types have been described so far, which crystallize in the space groups P63/mcm and P63/mmc, respectively (Vidican et ...

  • Assessments of effects of implementation of strategic plans for development of Belgrade District heating system

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić (2020)
    The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...
    Daljinsko grejanje, LEAP, Primarni energetski faktor, Uvozna zavisnost, CO2 emisija

  • Effects of external noise on threshold-induced correlations in ferromagnetic systems

    Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević (2021)
    Изингов модел, праг детекције, екстерни шум

  • Granatski amfiboliti Bistrice

    Jovana Opančina (2024)
    Predmet ispitivanja ovog završnog rada su granatski amfiboliti Bistrice. Izvršena su petrografska i hemijska ispitivanja s ciljem da se odredi stepen metamorfizma, protolit ispitivanih stena i P-T uslovi nastanka. Ispitivani granatski amfiboliti geografski pripadaju Prijepolju, tačnije nalaze se na ulasku u Prijepolje, mesto Bistrica. Geološka građa obuhvata uglavnom mezozojske tvorevine među kojima se nalaze sedimentne, magmatske i metamorfne stene. Geološki procesi koji su doveli do stvaranja amfibolita su procesi subdukcije i obdukcije koji su se pretpostavljamo dešavali na većim ...
    granatski amfiboliti, Bistrica, elektronska mikrosonda, polarizacioni mikroskop

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)

    Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)
    Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...
    Sphene, Phase transition, Raman spectroscopy, X-ray diffraction, SEM, IR

  • Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations

    Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović (2024)
    Monitoring Network, data, hydrogeological environment, tunnel, simulation

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... technical cooperation. In June 2016, the Centre for Karst Hydrogeology and the Faculty of Mining and Geology were visited by distinguished guests Prof. Dr. Abraham SpringeT, from the School of Earth Sciences and Environmental 15 CKH aktivnosti, Geološkog fakulteta, Univerziteta u Permu. Prilikom ...
    ... is well known for its numerous attractive surface and underground karst features, as well as beautiful nature. At the end of 2021, CKH was visited by Prof. Dr. Olga Meshcheriakova, Deputy Dean for Extracurricular Activities of the Faculty of Geology, University of Perm. During this visit, a ...
    ... Professional Practice in Earth Science, pp 435-454. ISBN 978-3-319-12849-8, DO!10.1007/978-3-319-12850-4, Springer International Publishing Switzerland, . Stevanović, Z. (ed.) (2015): Karst aquifers - Characterization and engineering, Series: Professional Practice in Earth Science, Springer International ...

  • Design and drilling of wells in formations with high pressure

    Vojin Solomun (2024)
    Objectives of this Thesis are to: - Develop an awareness of the challenges presented from elevated temperatures and pressures in well construction. - Learn the key differences between ―normal‖ condition wells and HPHT wells. - Understand some of the indicators of thermal- and pressure-related problems. - Understand the responses which may be made to mitigate high pressure and high temperature ,,HPHT‘‘ challenges while drilling wells. HPHT wells are an unavoidable consequence of the ever expanding search for oil and gas resources around the world. As wells are ...
    HPHT, well, challenges, design, oil and gas
    ... thermal properties; Regional geology - heat sources; Number of casing strings; Circulating rate; Drilled depth; Water depth; Time since commencement or cessation of circulation; Well inclination; Annular capacity; Initial undisturbed geothermal gradient; Ambient surface temperature; Hole size. Before ...
    ... rated to the maximum surface pressure which is based on a well fully evacuated to formation fluid from TD to the surface. A fluid gradient of 0.034 bar/m (0.15 psi/ft) will be used unless offset data can support the use of an alternative gradient. Surface Temperature - Surface Equipment has to be ...
    ... rating greater than 177"C (350%F); (2) The maximum anticipated surface pressure or shut-in tubing pressure is greater than 1035 bar (15,000 psi) on the seafloor for a well with a subsea wellhead or at the surface for a well with a surface wellhead; or (3) The flowing temperature is equal to or greater ...

  • A Teamwork-Based Protocol for a Holistic Approach to Selecting a Sustainable Mine Dewatering Management Plan

    Dragoljub Bajić, Sanja Bajić, Jelena Trivan, Ljubica Figun, Jelena Milovanović (2024)
    znanje eksperta, podzemne vode, primenjena matematika, fazi optimizacija, strategija održivog upravljanja, holistički sistem

  • Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study

    Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2023)
    Recently, nanocrystal dispersions have been considered as a promising formulation strategy to improve the bioavailability of the deuterated pyrazoloquinolinone ligand DK-I-56-1 (7‑methoxy-2-(4‑methoxy-d3-phenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one). In the current study, the freeze-drying process (formulation and process parameters) was investigated to improve the storage stability of the previously developed formulation. Different combinations of lyoprotectant (sucrose or trehalose) and bulking agent (mannitol) were varied while formulations were freeze-dried under two conditions (primary drying at -10 or -45 °C). The obtained lyophilizates were characterized in terms ...
    Pharmaceutical Science
    ... freezing temperature below Tg' should be achieved (Abdelwahed et al., 2006b; Yue et al., 2014), and this condition was met in both freeze-drying processes, while the freezing rate could be considered similar. The conditions for primary drying also depend on this parameter. In this lyophilization ...
    ... e due to its low concentration (Kim et al., 1998). 3.2. Particle size analysis and stability study In the present study, two freeze-drying processes were compared, with primary drying above or below Tg' (-10 "C in lyophilization-1 and -45 "C in lyophilization-2, respectively), in terms of particle ...
    ... different combinations of lyoprotectant and bulking agent. Although the particle size remained almost unchanged during the different lyophilization processes, proper selection of excipients as well as process parameters was crucial for improving stability during storage. While a sufficient amount of ...

  • Генеза хидротермалног Cu-Au система Чукару Пеки (Источна Србија)

    Милош Велојић (2021)
    Главни циљ испитивања хидротермалног система Чукару Пеки је разумевање процеса који су довели до његовог настанка, а посебно еволуције рудоносних флуида из којих је настала рудна минерализација. Утврђено је да је овај систем настао у периоду пре 86,78 - 85,19 Ma из магматског интрузива који је био богат водом и имао висок оксидативни потенцијал. Током хлађења, из овог магматског интрузива су издвојени веома врели флуиди, који су имали температуре изнад 600°С и висок салинитет. У ...
    Борска металогенетска зона, Тимочки магматски комплекс, порфирска лежишта, високосулфидациона лежишта, флуидне инклузије, рудне парагенезе, геохронологија, хидротермалне алтерације, LA-ICP-MS
    ... 1978. Hydrothermal alteration in active geothermal fields: Annual Reviews in Earth and Planetary Sciences, v. 6, 229-250. 22. Brown, K. L., 1986. Gold deposition from geothermal discharges in New Zealand. Economic Geology, 81(4), 979-983. 23. Бугарин, М., Маринковић, В., 2018. Елаборат о минералним ...
    ... Carpatho-Balkan Belt. Economic Geology, 99(3), 601-609. 89. Loader, M.A., Wilkinson, J.J., Armstrong, R.N., 2017. The effect of titanite crystallisation on Eu and Ce anomalies in zircon and its implications for the assessment of porphyry Cu deposit fertility. Earth and Planetary Science Letters ...
    ... ХИДРОТЕРМАЛНОГ Cu-Au СИСТЕМА ЧУКАРУ ПЕКИ (ИСТОЧНА СРБИЈА) 103 94. McDonough, W.F. and Sun, S.S., 1995. The composition of the Earth. Chemical geology, 120(3-4), 223-253. 95. Menant, A., Jolivet, L., Tuduri, J., Loiselet, C., Bertrand, G., & Guillou-Frottier, L. 2018. 3D subduction dynamics: ...

  • 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

  • English for Geology Students. 1

    Lidija Beko (2023)
    Engleski jezik
    ... part, as geol- ogists, in this ongoing story began much more recently with the systematization of the scien- tific study of the Earth in the 18th century. Earth science began to investigate the air we breathe and the waters that surround our continents; the land itself, the rocks, min- ...
    ... the geographical features such as mountain ranges and deserts; the living creatures with which we share our planet – every aspect of the Earth. Earth scientists, like their colleaguesin other fields, have developed a scientific method based on observation and collection of data, formu- ...
    ... interactions of terrestrial cycles and systems on a truly global scale, leading to a new field of research known as Earth system science. As well as looking back towards Earth, humanity has also begun to look outward, with unmanned probes studying and exploring out neighbouring planets ...