Претрага

Упит dcterms_subject_txt:Phase transition

150 items

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... of F, folds suggests top-WNW tec- tonic transport direction for D, phase. Transposition by solution and neo-crystallization of So„ bedding due to intense D, deformation was frequently observed (Fig. 3). Structures of D, phase were not observed neither in the Southern Triassic unit which preserves ...
    ... cases linked, sug- gesting that fault-related folding was the predominant mechanism during the Do phase. No penetrative planar structure has been observed to be associated with the D, phase except for the rare occurrence of a So» crenulation cleavage (folding the S, axial plane cleavage) in ...
    ... plastic deformation phase within our study area, and the estimated temperature based on D, microstructures is in a good agreement with the Kibler Indices, we correlate the anchizonal metamor- phism of the Northern Triassic and Paleozoic units with the D, deformation phase. Therefore, we interpret ...

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics

    Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić (2024)
    Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...
    Lecki vulkanski kompleks, andeyit, kalcedon, kvarc, opal-CT, mikrostruktura, organska materija

  • Sedimentologija gornje krede centralnog dela vardarske zone

    Violeta M. Gajić (2014-09-04)
    Područje istraţivanja obuhvaćeno doktorskom disertacijom nalazi se ucentralnim delovima Vardarske zone. Karakteriše se sloţenom geološkomgrađom koju grade mezozojske tvorevine trijaske, jurske i kredne starosti, kao ikvartarni sedimenti. U trijasu je istraţivano područje pokrivalo more, sve dogranice sa Šumadijom. Tokom jure sloţenim geotektonskim procesima stvarajuse ofiolitske stene rasprostranjene u juţnim i delom u centralnim delovimaistraţivanog područja. U donjoj kredi se pokretima dinarske faze izdiglo kopno,koje je egzistiralo skoro u celoj donjoj kredi područja istraţivanja.U alb-cenomanu pojedini delovi istraţivanog područja se ...
    Vardarska zona, gornja kreda, transgresija, litostratigrafskejedinice, sedimentologija, turbiditi
    ... calcites siltstones, clayey siltstones, sandy siltstones and sandy-clayey siltstones. They make a gradual transition to calcite sandstones, calcarenite and calcrudites, which represents the final phase of shallow-water facies and they are mostly eroded. In fine-grained sediments on Ješić and Rajac locality ...
    ... Cretaceous units by their characteristics indicate continuity in sedimentation, with no abrupt changes in the regime of deposition. Gradual transition of coastal, shallow-water (shelf) and basin carbonate or carbonate- clastic rocks (continental slope) indicates shallow character of the basin. ...
    ... ophiolitic rocks, widespreaded in the southern and partly in the central parts of the study area. In the Lower Cretaceous, tectonic movements of Dinar phase uplift the mainland, and these conditions existed almost throughout the whole Lower Cretaceous. In the Alb-Cenomanian, some parts of the study ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... Miladinović et al. 2008). Both crops do not have high demands for air temperature in the vegetative phase. Their demand for higher air temperatures increases at the start of the generative phase at the end of June and the first decade in July. The observed mean air temperature in the JJA period ...
    ... not used sufficiently. The economic development of Serbia in the last seventy years has largely been based on the use of mineral resources. The transition period, changes in the structure of ownership, loss of markets, technological obsolescence and other reasons caused the stagnation and reduction ...
    ... In 2015, Directive (EU) 2015/1513, shortly named the ILUC Directive, entered into force amending the RED and FQD. Its main purpose is to start transition from conventional to advanced biofuels that deliver substantial greenhouse gas savings. The ILUC Directive limits the share of crop- based biofuels ...

  • Threshold-induced correlations in the Random Field Ising Model

    Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević (2018)
    Multidisciplinary
    ... disorder in the ferro- magnetic hysteresis’ and the Barkhausen effect*. In athermal (T= 0) and nonequilibrium case, the model has a disorder induced transition®-!° in dimensions 2 < d < 6, while for dimensions d > 6 it is described in terms of the mean field theory'"“*. In this model, when the external magnetic ...
    ... corresponding author on reasonable request. References 1. Sethna, J. P. et al. Hysteresis and hierarchies: Dynamics of disorder-driven �rst-order phase transformations. Phys. Rev. Lett. 70, 3347 (1993). 2. Belanger, D. P. & Nattermann, T. In Spin Glasses and Random Fields, edited by Young, A. P. ...
    ... corresponding author on reasonable request. References 1. Sethna, J. P. et al. Hysteresis and hierarchies: Dynamics of disorder-driven first-order phase transformations. Phys. Rev. Lett. 70, 3347 (1993). 2. Belanger, D. P. & Nattermann, T. In Spin Glasses and Random Fields, edited by Young, A. P. (World ...

  • 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

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • 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
    ... 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 fugacity and its petrologic importance ...
    ... variables in silicic magmas. Contributions to Mineralogy and Petrology, 108(4), 485–510. Goodenough, J. B., (1967): Narrow-band electrons in transition-metal oxides. Czechoslovak Journal of Physics, 17(4), 304–336. Guillong, M., Meier, D.K., Allan, M.M., Heinrich, C.A., Yardley, B.W.D., (2008): ...
    ... XRPD, LA-ICP-MS methods. Results of examination reveals, beside main Fe-Ti oxides, presence of ferrian ilmenite in hornblende andesites of I volcanic phase as well as magnetite with notable Cr concentration in zone of Zlot magnetic anomaly. Examination of samples from porphyry system drill holes of Bor ...

  • 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

  • Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija

    Srđan D. Kostić (2013-11-04)
    U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...
    potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja
    ... appears as a transient feature. It is necessary to emphasize that, besides the more complex behavior, introducing time delay could induce the transition from periodic to equilibrium state, suppressing, in that way, fault motion, and, consequently, the seismic activity. On the other hand, frictional ...
    ... simulated fault gouge, Journal of Geophysical Research 95, 7007-25. 111.Marone, C., Scholz, C.H. 1988. The depth of seismic faulting and the upper transition from stable to unstable slip regimes, Geophysical Research Letters 15, 621-624. 112.Marsden, J.E., McCracken, M. 1976. The Hopf bifurcation and ...
    ... death in nonlinear oscillators with nonlinear coupling, Physical Review E 81, 027201, 1-4. 148.Pomeau, Z., Manneville, P. 1980. Intermittent transition to turbulence in dissipative dynamical systems. Communications in Mathematical Physics, 74, 189-197. 149.Popov, V.L., Grzemba, B., Starcevic ...

  • Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija

    Srđan D. Kostić (2013-11-04)
    U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...
    potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja
    ... appears as a transient feature. It is necessary to emphasize that, besides the more complex behavior, introducing time delay could induce the transition from periodic to equilibrium state, suppressing, in that way, fault motion, and, consequently, the seismic activity. On the other hand, frictional ...
    ... simulated fault gouge, Journal of Geophysical Research 95, 7007-25. 111.Marone, C., Scholz, C.H. 1988. The depth of seismic faulting and the upper transition from stable to unstable slip regimes, Geophysical Research Letters 15, 621-624. 112.Marsden, J.E., McCracken, M. 1976. The Hopf bifurcation and ...
    ... death in nonlinear oscillators with nonlinear coupling, Physical Review E 81, 027201, 1-4. 148.Pomeau, Z., Manneville, P. 1980. Intermittent transition to turbulence in dissipative dynamical systems. Communications in Mathematical Physics, 74, 189-197. 149.Popov, V.L., Grzemba, B., Starcevic ...

  • Uticaj utiskivanja gas-lift gasa na prenos mase i toplote

    Branko Grubač (2019)
    Nakon uvođenja kontinualnog gas-lifta, primećen je porast proizvodnje tečnog naftnog gasa, TNG, u postrojenju za preradu gasa, kao jednog od finalnih proizvoda dobijenog iz fluida gaso kondenzatnih i rastvorenog gasa iz naftnih bušotina. Pretpostavljeno je da se prisustvom gas-lift gasa uspostavlja drugačija ravnoteža faza u odnosu na slučaj bez gaslifta, te da je gas-lift gas stripovao propan i butane iz tečne u parnu fazu, što je dovelo do povećanja prinosa TNG-a. Napravljen je model bušotine koja radi u kontinualnom gas-liftu ...
    gas-lift, modelovanje bušotine, prenos mase i toplote, taloženje parafina
    ... [66] R. Das, S. Pattanayak, Bubble to slug flow transition in vertical upward two-phase flow through narrow tubes, Chemical Engineering Science, Vol. 49, str 2163-2172, (1994) [67] H. Mukherjee, J. Brill, Pressure drop correlations for inclined two-phase flow, Journal of Energy Resources Technology ...
    ... unified mechanistic model for slug liquid holdup and transition between slug and dispersed bubble flow, International Journal of Multiphase flow, Vol. 29, str 79-107, (2003) [80] D. Barnea, N. Brauner, Holdup of the liquid slug in two phase intermittent flow, International Journal of Multiphase ...
    ... Pedersen, P. Christensen, J. Shaikh, Phase behavoir of petroleum reservoir fluids, second edition, Taylor & Francis Group, str 269-297, (2015) [100] K. Won, Thermodynamics for solid-liquid vapor equilibria: Wax phase formation from heavy hydrocarbon mixtures, Fluid Phase Equilibria, Elsevier, str 265-279 ...

  • Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове

    Јелка Крушић (2023)
    Тецишта су комплексне појаве нестабилности које захтјевају истраживања и испитивањакоја до сада нису рађена код нас у области геотехнике. По механизму, начину активирањаи понашању покренутог материјала се знатно разликују од клизишта. Циљ оведисертације је била примјена нумеричких модела пропагације тецишта на примјеру двијепојаве које су се десиле у Србији као посљедица дјеловања циклона Тамара. Детаљноистраживање тецишта подразумијева теренско картирање, теренска истраживања илабораторијска испитивања одабраних узорака са терена. Од теренских истраживања напримјеру тецишта Селанац урађена су геофизичка истраживања Електричнетомографије док ...
    тециште, нумерички модели пропагације, циклон Тамара, геофизичка истраживања, лабораторијска испитивања, Селанац, Лева река, RAMMS, SPH geoflow, реолошки модел

  • Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel (2016)
    General Earth and Planetary Sciences
    ... observed in this area (Fig. 8d). Kinematic indicators such as foliation-parallel asymmetric drawn boudins (Fig. 5f; drawn- to shearband-boudin transition of Goscombe et al. 2004) and C' shear bands suggest top-to-the-south-west sense of shear (Fig. 6). Vlasina Unit Due to structural complexity ...
    ... intensity of the later deformational overprint(s). Based on the similarities in structural style, the deforma- tion stage D, corresponds to the “phase I” from the detailed structural study of the Vlasina Unit by Petrović (1969). The 1681 1665—1692 Int J Earth Sci (Geol Rundsch) (2017) 106: ...

  • Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event

    Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco (2023)
    Brachiopods, taxonomy, biostratigraphy, early Toarcian Anoxic Event, Bulgaria

  • 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

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... X-ray diffractograms show the presence of crystalline inorganic compounds for some of the chars in accordance with the chemical analysis and a transition of the carbon-rich matrix from nearly unaltered cellulose for the hydrochars to turbostratic carbon for the gasification bio- chars. The results ...
    ... of biochars as a sustainable carbon source. Two main types of production pro- cesses are used to carbonize biomass either in contact with a gas phase (pyrolysis or gasifica- tion) or in the presence of liquid water under pressure (hydrothermal carbonization). Pyrolysis is typically performed under ...
    ... a Dionex* IonPac" AG15 (4 x 50 mm, P/N 053942) and a Dionex” IonPac” AS15 IC (4 x 250 mm, P/N 053940) as guard and analytical columns. The mobile phase was 38 mM KOH with a continuous flow rate of 1 ml min . In addition, the column temperature was 30 "C, the conductivity cell temperature 35 "C and ...

  • Процена емисије гасова са ефектом стаклене баште као последице енергетске активности

    Горана Остојић (2024)
    Рад се бави анализом и проценом емисија гасова са ефектом стаклене баште, са посебним акцентом на емисије које настају као последица енергетских активности. Ефекат стаклене баште представља природни процес који је неопходан за одржавање живота на Земљи, али антропогене активности, попут индустријске производње и сагоревања фосилних горива, значајно повећавају концентрацију ових гасова у атмосфери, што доводи до климатских промена. Рад истражује узроке, последице и могућности за смањење емисија гасова, као и развој стратегија за ублажавање негативних ефеката на животну ...
    емисија гасова, ефекат стаклене баште, енергетске активности, климатске промене, мобилно сагоревање, стационарно сагоревање
    ... curopa.eu/clima/policies/eu-climate-action/2030 _ ctp_en [32] Federal Ministry for Economic Affairs and Energy (Germany). (2020). 7he Energy Transition in Germany. Retrieved from https://www.bmwi.de/Redaktion/EN/Dossier/energy-transition.html [33] Ministry of Finance, Sweden. (2020). Carbon Taxation ...

  • Badenske školjke jugoistočnog oboda Panonskkog basena (Centralni Paratetis)

    Gordana M. Jovanović (2014-12-05)
    Rad obuhvata detaljnu studiju badenskih školjaka koje potiču sa terenajugoistočnog oboda Panonskog basena (Centralni Paratetis). Proučavani su lokaliteti naprostorima Srbije (Fruška gora, Golubac, okolina Beograda, Aranđelovca, Koceljeva,Loznica) i severoistočne Bosne (Ugljevik). Pored taksonomske analize i paleontološkihopisa bivalvija, u radu je dat i spisak revidovanih vrsta koje su do sada pronađene usedimentima badenskog kata istraživanog terena. Do sada je ukupno poznato 41familija, 108 rodova i 174 taksona. Identifikovano je 170 bivalvijskih vrsta, međukojima su neke prvi put konstatovane na ovim ...
    školjke, baden, Panonski basen (Centralni Paratetis), stratigrafija,paleoekologija, paleogeografija, paleobiogeografija
    ... Museum Wien A, 104: 85-127. Harzhauser, M., Mandic, O. i Zuschin, M., 2003. Changes in Paratethyan marine molluscs at the Early⁄Middle Miocene transition – diversity, paleogeography and paleoclimate. Acta Geologica Polonica, 53: 323-339. Harzhauser, M. Piller, E., W. 2007. Benchmark data of a changing ...
    ... Müllegger, S., Grunert, P., Micheels, M. 2011. Changing seasonality patterns in Central Europe from Miocene Climate Optimum to Miocene Climate Transition deduced from the Crassostrea isotope archive. Global and Planetary Change 30, 76, 1-2: 77-84. Harzhauser, M., Mandic, O., Schlogl, J. 2011. A ...
    ... Catalogus Conchyliorum quae reliquit D. Alphonso D’Aguirra et Gadea Comes de Yoldi, Copenhagen, 2, 74 pp. Mourik 1981. The Middle Miocene Climate Transition in the Central Mediterranean. A. Geologica ultraiectina Mededelinigen van de Faculteit Geowetenschappen - Universiteit Utrecht, 326, 133 pp. ...