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Упит dcterms_subject_txt:kinetic study

708 items

  • 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

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... Krane H.G., Meyer H., Nistor L. and Van Trendeloo G. (1996) A synchrontron radiation, HRTEM, X-ray powder diffraction, and Raman spectroscopy study of malayaite, CaSnSiO5. Am Mineral 81: 595-602. http://www.springerlink.com/content/?Author=L.+G.+Gerasimova http://www.springerlink.com/content/ ...
    ... Ghose S., Ito Y. and Hatch D.M. (1991) Paraelectric-Antiferroelectric Phase Transition in Titanite, CaTiSiO5: I. A high temperature X-ray diffraction study of the order parameter and transition mechanism. Phys Chem Miner 17: 591-603. Dana E.S. (1959) Manual of mineralogy. John Wiley and Sons,17th edition ...
    ... Ивенсен, В.А. (1985) Феноменология спекания Cкачать. Металлурги, Москва. Ishida S., Hayashi M., Fujimura Y. and Fujiyoshi K. (1990) Spectroscopic study of chemical state and coloration of chromium in rutile. J Am Ceram Soc 73: 3351–3355. Jahn H.A. and Teller E. (1937) Stability of Polyatomic Molecules ...

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... Krane H.G., Meyer H., Nistor L. and Van Trendeloo G. (1996) A synchrontron radiation, HRTEM, X-ray powder diffraction, and Raman spectroscopy study of malayaite, CaSnSiO5. Am Mineral 81: 595-602. http://www.springerlink.com/content/?Author=L.+G.+Gerasimova http://www.springerlink.com/content/ ...
    ... Ghose S., Ito Y. and Hatch D.M. (1991) Paraelectric-Antiferroelectric Phase Transition in Titanite, CaTiSiO5: I. A high temperature X-ray diffraction study of the order parameter and transition mechanism. Phys Chem Miner 17: 591-603. Dana E.S. (1959) Manual of mineralogy. John Wiley and Sons,17th edition ...
    ... Ивенсен, В.А. (1985) Феноменология спекания Cкачать. Металлурги, Москва. Ishida S., Hayashi M., Fujimura Y. and Fujiyoshi K. (1990) Spectroscopic study of chemical state and coloration of chromium in rutile. J Am Ceram Soc 73: 3351–3355. Jahn H.A. and Teller E. (1937) Stability of Polyatomic Molecules ...

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... considerations in selection of bucketwheel excavators. Int. J. Surf. Mining Reclam. Environ. 1987, 1, 67–72. [CrossRef] 3. Khorzoughi, M.B.; Hall, R. A Study of Digging Productivity of an Electric Rope Shovel for Different Operators. Minerals 2016, 6, 48. [CrossRef] 4. Vîlceanu, F.; Iancu, C. Bucket wheel ...
    ... 51–79. [CrossRef] 22. Mitrović, D.; Ðoković, N.; Zivotic, D.; Bechtel, A.; Šajnović, A.; Stojanović, K. Petrographical and organic geochemical study of the Kovin lignite deposit, Serbia. Int. J. Coal Geol. 2016, 168, 80–107. [CrossRef] 23. ISRM. Suggested Method for Determining the Uniaxial Compressive ...

  • Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone

    Aleksandar Luković (2021)
    Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...
    magnetit, hematit, hemoilmenit, Borska metalogenetska zona, porfirska ležišta
    ... reactions: a case study of the replacement of pentlandite by violarite. Geochimica et Cosmochimica Acta 73, 1945-1969. Xu, H., Shen, Z., & Konishi, H., (2014): Si-magnetite nano-precipitates in silician magnetite from banded iron formation: Z-contrast imaging and ab initio study. American Mineralogist ...
    ... grains revealed by magnetic force microscopy (MFM), Phys. Earth Planet. Inter., 141. Friák, M., Schindlmayr, A., & Scheffler, M., (2007): Ab initio study of the half-metal to metal transition in strained magnetite. New Journal of Physics, 9(1), 5–5. 91 Frost, B.R., (1991): Introduction to oxygen ...
    ... Earth and Planetary Science Letters, 224, 461-475. Kouzmanov, K., Moritz, R., Chiaradia, M., Fontignie, D., Ramboz, C., (2001): Sr and Pb isotope study of Au-Cu epithermal and porphyry-Cu deposits from the southern part of the Panagyurishte 93 district, Sredna Gora zone, Bulgaria. In: Piestrzynski ...

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... 11000 Belgrade, Serbia 4 Kovin coal mine, Cara Lazara 85, 26220 Kovin, Serbia doi: 10.4154/gc.2019.06 Abstract A geochemical and mineralogical study was performed on lignite samples from the Upper Mio- cene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high mois- ...
    ... heterotrophic bacteria. The same samples were used to determine the content and distribution of major and trace elements in the coal. The aim of this study is to present the content and mode of occurrence of major and trace elements in coal from the Kovin deposit in order to assess their behaviour in ...
    ... occurs in aluminosilicate mine­ rals, most probably Cr­rich chlorite (Fig. 4d). The ultramafic rocks which outcrop in the southeastern part of the study area can be the source of Cr in the studied lignite. Furthermore, a high content of Cr, Ni and other elements detected in lignite from the Drmno ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... of the Basic geological map 1:100.000, 2009, BLAGOJEVIĆ D. Geozavod Nemetali: Map of geological curiosities in Serbia 2004-2005, JOVANOVIĆ, J. FMG: Study on the hydro-geological research carried out in order to create the geological and hydro-geological information system of the National park Djerdap ...

  • 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 ...
    ... Procesna tehnika, 14-18, 2018. [6] D. Ivezić, M. Gluščević, S. Jerotić, Possibilities for introduction of Bioenergy Village concept - a case study of Serbia, Proceedings of the 3rd Renewable Energy Sources - Research and Business RESRB 2018 conference, 2018, Brussels, Belgium. [7] Juan Manuel Ugalde ...

  • Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2023)
    ... distance and the rock mass oscillation velocity expressed in the obtained functions. The relation between parameters K and m has been obtained in this study. This relation made it possible to find the value of the second parameter for the given determined value of one parameter. In practice it is simpler ...

  • Failure Estimation of the Majdanpek Open Pit East Face Based on Inverse Velocity Model

    Miloš Marjanović, Stefan Milanović, Nikola Simić, Lazar Kričak (2024)
    The Majdanpek open pit mine south district is currently active mining prospect of copper ore exploitation in eastern Serbia. Its depth is approaching the termination depth and occurrences of large-scale instabilities and global instability of the final pit slope is possible. These can generate catastrophic mass movement inside an area that encloses a regional road route and the Pek River bed which is channelled along the outer contour of the pit. The displacements that were noted in early 2023, in the ...
    displacement, survey, inverse velocity, open pit

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... Such structures are encountered in many thesauruses, semantic networks and ontologies. Taxonomies in the broadest sense of the term involve the study of the general principles of sci- entific or systematic classification. The notion of a taxonomy or systematic classification usually implies an ordered ...
    ... AAPg; Internacionalni stratigraf- ski vodič i rečnik stratigrafskih termina. Jovanović, r., Jovanović, D. 2007 Naftagas, Novi Sad ; Petrolo- gy: The Study of Igneous, Sedimentary and metamor- phic rocks. raymond, l.A. 2002 mcgraw-hill. 736 str., New york.; geološko kartiranje. Dimitrijević, D. m. 1978 ...

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... that the resulting solution was free of Ag? ions and that the chlorido complex had been converted completely into the aqua species. Kinetic measurements UV–Vis kinetic measurements were carried out on a Per- kin-Elmer Lamda 35 double-beam spectrophotometer equipped with thermostated 1.00-cm quartz ...
    ... potentiometric and spectrophoto- metric methods. The structures of [Ru(trpy)(bpy)Cl]? and nucleophiles are shown in Fig. 1. Results and discussion Kinetic studies Kinetics of the substitution reactions of [Ru(trpy)(bpy)Cl]? with nucleophiles Tu, L-His, DMSO, and 50-GMP were investigated spectropho ...
    ... absorbance of the complex at different chloride concentrations. The obtained results are given in the Supplementary material (Table 1S; Fig. S1). All kinetic experiments were per- formed under pseudo first-order conditions, where the concentration of nucleophiles was always in at least tenfold excess ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... blast site, characteristics of the rock mass and the type of blasting, it is the equa- tion of M. A. Sadovski that is used most commonly. In this study, parameters n and K in the law of Sadovsky were determined in two ways – models in the given work environ- ment. The first model is the usual method ...
    ... Statis- tics, Technique for Copying of the Bureau of Construction, Belgrade, pp. 329-331. [7] Trajković S., Tokalić R., Lutovac S., (2004): Study of Seismic Impactson the Surrounding Building Structures as the Result of Blasting at the Open Pit “Kovilovača” - Despotovac, Faculty of Mining ...

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor

    Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić (2023)
    železnica, prekogranični teretni saobraćaj, ARIMA, LSTM, SSA

  • 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
    ... susceptibility was measured as a function of temperature between 2 and 300 K in an applied field of 1000 Oe. Latshaw et al. (2016b) reported the first study on the magnetism of the structural family of Na3REESi2O7 compounds (REE = Ho, Yb), which are paramagnetic and similar in composition with respect ...
    ... susceptibility was measured as a function of temperature between 2 and 300K in an applied field of 1000 Oe. Latshaw et al. (2016b) reported the first study on the magnetism of the structural family of Na;REESi,O, compounds (REE = Ho, Yb), which are paramagnetic and similar in composition with respect to ...
    ... (space group P63/mmc) 295† 100 203, 193, . . . , 93 �0-K3YbSi2O7 (space group Cmcm) † Repeated data collection for crystal 2 after the low-temperature study. Table 2 Experimental details. Experiments were carried out with MoK� radiation using a Rigaku Oxford Diffraction Gemini Ultra diffractometer. An ...

  • A Description of Morphological Features of Serbian: a Revision using Feature System Declaration

    Cvetana Krstev, Ranka Stanković, Vitas Duško (2010)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    Morphology, Lexicon, lexical database, Standards for LRs
    ... Hungary, April 13th, 2003, eds. T. Erjavec and D. Vitas, pp. 33-40. Savary, A. (2008). Computational Inflection of Multi-Word Units – A Contrastive Study of Lexical Approach, In: Linguistic Issues in Language Technologies, Vol. 1, No. 2, CSLI Publications. 819 ...

  • Formative evaluation of e-learning projects with the logical framework approach

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... process nature, being the set of activities related useful for expressing an opinion argued for an aim [3]. Evaluation is the activity aimed to study, evaluate and improve programs and projects in all their important aspects, including the diagnosis of the problem to address, their conception ...

  • Увођење доменских и семантичких маркера за област рударства у српске електронске речнике

    Иван Обрадовић, Александра Томашевић, Ранка Станковић, Биљана Лазић (2017)
    ... (Volume 1). Cambridge, MA, USA: Cambridge Uni- versity Press. Макарти/Џарвис, 2010: McCarthy, P.M., & Jarvis, S. MTLD, vocd-D, and HD-D: A validation study of sophisticated approaches to lexical diversity assess- ment, Behavior Research Methods, 42(2), pp. 381–392. Иван Обрадовић, Александра Томашевић ...