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Упит dcterms_subject_txt:Global and Planetary Change

2413 items

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija

  • Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis

    Ivan Kojić, Achim Bechtel, Reinhard Sachsenhofer, Dragana Životić, Ksenija Stojanović (2019)

  • Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia

    Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović (2020)
    Earth-Surface Processes
    ... ion of samples V3 and V4. Regarding all of these facts, it can be concluded that during the deposition of geological layers at the investigated location, there has been a slight movement of the river bed, which has led to a change from the deeper marsh-like towards a shallower and finally to the terrestrial ...
    ... sample V5 (Figs. 5 and 6) has indicated a mixed origin of the OM with a major input of microorganism in the precursor biomass, with a certain con- tribution of terrestrial plants. Such distribution caused an abrupt change in many parameters such as CPI, OEP, TAR, LSR (Table 4, Fig. 7), and particularly for ...
    ... Thermal degradation during the fire causes the change in n-alkane distribution and shifts Cmax from higher to shorter n-alkanes, which is characteristic for the combustion tem- peratures around 500 °C. The prevalence of short-chain n-alkanes (particularly n-C16 and/or n-C18) is an important indicator of in- ...

  • Stepen metamorfizma metaklastita rudnika

    Vanja Ćuk (2024)
    Zadatak ovog rada je bio, potvrda saznanja da se na planini Rudnik dogodio kontaktni metamorfizam gornjokrednih sedimentnih stena i da se ispita intenzitet kontakto-metamorfnih promena. Posle kraćeg opisa geografskog položaja, pregleda ranijih istraživanja i geologije šireg područja, usmerena je pažnja na petrološka ispitivanja metaklastita i na kontaktno-metamorfne facije. Usled stvaranja različitih vulkanogenih facija odnosno usled vulkanskih erupcija, delovanjem zagrejane magme (lave) ili zagrejanih fluida, došlo je do kontaktnog metamorfizma, na granici oligocen-miocen i do stvaranja različitih metamorfnih stena, a ...
    Kontaktni metamorfizam, Rudnik, metakonglomerati, metapeščari, metaalveroliti

  • 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
    ... could be caused by the change from the glassy to the rubbery state of the steric stabilizers (polysorbate 80 and/or poloxamer 407). In this case, the nanoparticles would become mobile and could form solid aggregates. This process is favored at higher storage temperatures and in the presence of ...
    ... stability during storage, and drug nanocrystals are usually considered very stable if their redispersibility does not change significantly during storage (Beirowski et al., 2011). Since parenteral formulations are in focus, the dispersions should be redispersed rapidly and maintain nanometer particle ...
    ... detected by XRPD due to its low concentration and low intensity of diffraction peaks when it is in nanocrystalline form. The crystal structure of DK-I-56-1 in nano- crystalline formulation was confirmed in Mitrović et al. (2020), and would probably not change during lyophilization. The main disadvantage ...

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid

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

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)

  • Comparison of sequential and single extraction in order to estimate environmental impact of metals from fly ash

    Aleksandra Tasić, Ivana Sredović-Ignjatović, Ljubiša Ignjatović, Marija Ilić, Mališa Antić (2016)
    The aim of this paper is to simulate leaching of metals from fly ash in different environmental conditions using ultrasound and microwave-assisted extraction techniques. Single-agent extraction and sequential extraction pro¬cedures were used to determine the levels of different metals leaching. The concentration of metals (Al, Fe, Mn, Cd, Co, Cr, Ni, Pb, Cu, As and Be) in fly ash extracts were measured by inductively coupled plasma-atomic emission spectrometry. Single-agent extractions of metals were conducted at sonication times of 10, ...
    leteći pepeo uglja, ekstrakcija sa jednim agensom, sekvencijalna ekstrakcija, mikrotalasi, ultratalasi

  • Results of Recent Monitoring Activities on Landslide Umka, Belgrade, Serbia—IPL 181

    Biljana Abolmasov, Uroš Đurić, Jovan Popović, Marko Pejić, Mileva Samardžić Petrović, Nenad Brodić (2021)
    Klizišta, Monitoring, GNSS, Geodetska osmatranja, UAV snimci, PSInSAR

  • Understanding the effect of synthesis and sintering temperature on the functional properties of barium titanate/cobalt ferrite composites

    Marija Šuljagić, Aleksandar Kremenović, Ivan Petronijević, Adis Džunuzović, Miljana Mirković, Vladimir Pavlović, Ljubica Anđelković (2023)
    To investigate the effect of synthesis procedure and sintering temperature on the functional properties of perovskite/spinel ceramics, BaTiO3/CoFe2O4 composites were prepared by thermal decomposition, coprecipitation, and microemulsion method, and sintered at 1150°C and 1300°C. The phase composition and morphology of as-prepared powders as well as sintered ceramics were thoroughly examined by X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS). The dielectric and ferroelectric measurements were performed in detail. Generally, the ...
    Perovskite/spinel ceramics, Multiferroic, Sintering, Influence of synthesis method

  • Multihazard Exposure Assessment on the Valjevo City Road Network

    Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)
    Prirodni hazardi, izloženost, klizišta, poplave, bujice, GIS, R
    ... both a global and local trend, noticed in both industrialized and devel- oping countries (Guzzetti, Reichenbach, Cardinali, Galli, & Ardizzone, 2005). The evidence of increased exposure to natural disasters is witnessed in extreme rainstorms and related flood- ing and landsliding in 2006 and 2014, ...
    ... these statistics are prone to change as climate change takes effect. Even the most optimistic scenario (i.e., the smallest predicted increase of greenhouse gas emis- sions) suggests that we will be facing drier, but more violent, weather with pronounced pre- cipitation and temperature extremes, which ...
    ... might change that perspective significantly if natural hazards in climate changing conditions are not taken seriously. To plan future road network develop- ment properly, one first needs to consider the spatial context of the most affective hazards, 671Spatial Modeling in GIS and R for Earth and Env ...

  • Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду

    главни и одговорни уредник Душан Поломчић (2016)
    Рударско-геолошки факултет

  • ‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions

    Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban (2020)
    Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...
    Firing, Glaze, Traditional ceramics, Provenance studies, Augite

  • Damage quantification of built stone on Dark Gate (Belgrade, Serbia): sample of damage index application for decay rate evaluation

    Maja Franković, Nevenka Novaković, Vesna Matović (2015)
    The Dark Gate is the monument of culture, part of the cultural and historical complex of the Belgrade Fortress. It is constructed of limestone blocks that after 270 years of exposure to environmental conditions and different anthropogenic influences show wide ranges of decay forms. During 2007, detail registration of all built limestone microfacies and weathering forms was done using tools of monument mapping. A correlation scheme ‘‘intensity– damage category’’ was made according to the type, intensity, and distribution of ...
    Krečnjak, mapiranje, Indeks raspadanja, brzina raspadanja, progresija
    ... building and artistic pur- poses. Although stone is generally considered an epitome of durability, factors such as climate change, pollution, use demands, lack of maintenance, and inappropriate past treatments present challenges for the conservation of stone buildings, structures and objects ...
    ... crusts are the ones that provoke surface recession, white crusts are thin and uniformly cover the surface of stone blocks. Discolor- ation is present as chromatic color change due to the oxidation of Fe-components and due to accumulation of coloring components near the stone surface. This form ...
    ... 1997a, b, Hein- richs and Fitzner 2000, 2007; Fitzner and Heinrichs 2002; Rothert et al. 2007). Also, it was used as reference for a number of researches on techniques for assessment of stone decay (Ball and Young M 2000; Turkington and Smith 2004; Kukela and Seglins 2011). Based on quantitative ...

  • 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
    ... kicks still occur and vary in type, composition and severity. Kick detection is far from an exact science and, like many critical rig operations, can be subject to the vagaries of human decision-making and experience. As techniques for kick detection continue to improve, the global drive to drill ...
    ... in quickly and correctly way and to understand the expected behavior of the well during operations. Clear communication between the driller, the mud loggers, and well pressure measurements operators are required to obtain good results. Pressure, temperature, and tank volumes change continuously ...
    ... contingency plans, and procedures. The team must have clear roles & responsibilities, decislon-making protocols, MoC (Management of Change) appreciation, Sıituational Awareness, “Stop the job” authority, and a learning culture. 17 Key points - Complex well architecture and reduced operational ...

  • Минерагенија зеолитских туфова Србије

    Vladan Kašić (2018-02-05)
    Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...
    минерагенија, зеолитски туф, Србија, клиноптилолит, хојландит

  • Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations

    Ivana Vasiljević, Snežana Ignjatović, Branislav Sretković (2024)
    The type of dip-slip faults can be assessed based on the analysis of vertical gravity gradients. Theoretically, just a simple comparation of the gradient extreme values can give us an answer whether the fault is normal or reverse (thrust). Practical application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. ...
    dip-slip faults, vertical gravity gradients, field data analysis
    ... r of gravity gradient tensor for estimating fault dips considering fault type. Earth and Planetary Science, 4:15. Rakić M., Dimitrijević M., Terzin V., Cvetković D., Petrović V., 1973: Geological map and Guide book for sheet Niš (K34-32), Basic Geological! Map of SFRY. Federal Geological ...
    ... development and innovation of the Republic of Serbia, based on contract no. 451-03-65/2024- 03/200126. REFERENCES Essa K.S., Gćraud Y., Diraison M., 2021: Fault parameters assessment from the gravity data profiles applying the global particle swarm optimization. Journal of Petroleum Science and Engineering ...
    ... fault parameters from the gravity anomaly data using the global particle swarm optimization. Some authors (Toushmalani, 2010, Wahyudi et al., 2016, Wada et al., 2017, Sumintadireja et al., 2018) prefer to utilize gravity horizontal and/or vertical gradients to assess the characteristics of the ...

  • 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
    ... between orogenic building and subsequent extension during the tertiary evolution of the NE Dinarides: constraints from low- temperature thermochronology. Glob Planet Change 103:19— 38. doi:10.1016/j.gloplacha.2012.08.004 Tchoumatchenco P (2006) Jurassic tectonics of Bulgaria and the adja- cent areas ...
    ... Europe-Adria collision: the Fruška Gora of northern Serbia. Glob Planet Change 103:39-62. doi:10.1016/j. gloplacha.2012.10.009 Tranos MD, Lacombe O (2014) Late Cenozoic faulting in SW Bul- garia: fault geometry, kinematics and driving stress regimes. Implications for late orogenic processes in ...
    ... metamorphic rocks from the Getic zone and the SMM that have experienced clockwise rotation and dextral strike-slip tectonics during the Alpine orogeny (e.g. Csontos and Voros 2004; Figenschuh and Schmid 2005). The evidence of pre-Variscan deformation and HP metamorphism proposed previously ...

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel