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Упит dcterms_subject_txt:ratio of modified secondary and primary compression index

2731 items

  • Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia

    Dragoslav Rakić, Irena Basarić Ikodinović, Jovana Janković, Tina Đurić (2022)
    The paper presents the results related to the determination of the index of primary and maximum and minimum indices of secondary compression, i.e. modified primary and secondary compression indices (Cc, Cc', C'min, C'max), obtained by laboratory testing of artificially prepared municipal waste samples (three series of 9 samples in total) in an oedometer apparatus with a diameter of 20 cm. Old municipal waste was used, which was taken from two landfills in Serbia, one that is ...
    municipal solid waste, secondary compression index, ratio of modified secondary and primary compression index

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... samples (triaxial tests) and block-shaped rock material samples (modified wedge test method). The results of the laboratory triaxial test allow empirical comparison with the values already available from experience. Minerals 2021, 11, 564 8 of 17 6.1. Triaxial Compression Test (Triaxial Test) Method ...
    ... Results of triaxial compression tests of coal. Minerals 2021, 11, 564 12 of 17 σ Figure 16. Shear strength of coal. 7.2. Modified Wedge Test Method Cutting resistance tests in underwater mining conditions were carried out on prismatic specimens, dimensions 100 × 100 × 100 mm, which are placed at the ...
    ... results and empirically determined values, the results of the modified wedge test largely correspond with the values of cutting resistance determined on the basis of the empirical diagram. According to the presented results of laboratory tests and comparative analysis, the suggested methodology of cut- ...

  • Joint interpretation of paleomagnetic, structural and AMS results from the Vardar Zone of Serbia

    Emo Marton, Marinko Toljić, Vesna Lesić, Vesna Cvetkov (2021)

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • 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
    ... results of this study, primary drying should be performed below Tg to promote interactions between lyoprotectant and the nanocrystals. In all cases, a sucrose/ trehalose to mannitol ratio of 3:2 at a total concentration of 10% lead to the maintenance of particle size during lyophilization and three ...
    ... on was performed immediately after freeze-drying and after one month of storage. For lyophilization-2, samples were frozen at -50 "C for 3 h and then primary dried at -45 "C and 0.2 mbar for 21 h, which was followed by secondary drying at 20 *C for 30 h in a Telstar LyoBeta Mini freeze dryer ...
    ... The temperature of primary drying had no significant effect on particle size, but stability during storage was impaired for samples dried at -10 "C. Samples dried at lower temperature were more homogeneous and remained stable for three months. It was found that the optimal ratio of sucrose or trehalose ...

  • Phytoecological analysis of primary and secondary colonization on copper mine wastes (Bor, Serbia)

    Ranđelović Dragana, Jovanović Slobodan (2013)

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... (up to 7 years of age); Primary schools: a) Regular primary schools, b) Primary schools for the adult education, c) Primary music or ballet schools and 2 Chapter # - will be assigend by editors d) Primary schools for students with developmental disorders; Secondary schools: a) ...
    ... especially at the pre-school and tertiary level. Primary education in Serbia is mandatory and available for free of charge in public elementary schools. Secondary and tertiary education is free in public schools and universities (although for a limited number of students), but it is not mandatory ...
    ... Law on the Basis of the Education System (Official Gazette of RS, No. 68/2015), comprises the following levels: 1.Pre-school education and upbringing; 2.Primary education and upbringing; 3.Secondary education; 4.Tertiary education. These levels of education are carried out ...

  • 2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem

    Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov (2019)
    2D inversion, geoelectrical method, Wenner array, ecology, Ada Huja
    ... Institute, Belgrade. SUPAWEE, M. and WANLOP, H. (2014) Rheological and mechanical properties of recycled PET modified by reactive extrusion. Energy Procedia, 56, pp. 547-554. ŠPERL, J. and TROČKOVA, J. (2008) Permeability and porosity of rocks and their relationship based on laboratory testing. Acta ...
    ... the presence of underground waterthat was detected. There are secondary problems that arise with the disposal of PET containers in landfills, such as production of benzene, toluene and ethyl-benzene in gas or leachate form. There is evidence that PET disposal can lead to the upsurge of hydrogen-sulfide ...
    ... type rocks that make up the basis of the half- space also have a low resistivity value, but one order of magnitude greater that the deposited waste. Figure 4 Sections of apparent (top) and true (bottom) resistivity values of profile line I, part 3 (modified after Sretenović, 1998) Information ...

  • New Pliensbachian rhynchonellide (Brachiopoda) from Livari, (Rumija Mountain, Montenegro): taxonomy and shell microstructure implications

    Barbara V. Radulović (2022)
    An interesting case of close external similarity (homoeomorphy) is revealed by the study of an Early Jurassic rhynchonellide brachiopod from Livari, Rumija Mountain, southern Montenegro. Shell microstructure was used as the primary diagnostic tool, applied before serial sectioning to study internal characters. Sepkoskirhynchia sphaerica gen. et sp. nov. is erected based on the presence of coarse fibrous shell microstructure and subfalciform crura. Because of these primary diagnostic characters, the new genus is placed in the rhynchonellide family Basiliolidae. The ...
    Brachiopods, Jurassic, Sepkoskirhynchia, Soaresirhynchia, shell microstructure, Dinaric Carbonate Platform

  • The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station
    ... municipal waste (primary and secondary), area for use and processing of unselected waste (biological treatments, thermal treatments) as well as area for mechanical treatment of waste, which significantly reduces waste volume before final disposal at the landfill, either by shredding or compaction (Rakic ...
    ... application of geosynthetic nets for soil reinforcement under foundations, stabilization of the terrain by the application of the so-called georaft system using "honeycomb" geosynthetic systems, and it is possible and the application of a deep compaction system, or a deep vibrational compression). Considering ...
    ... transporter zone, zone for receiving and temporary storage of recyclable waste and specific waste, zone for washing of vehicles and containers, wastewater treatment zone and waste separation zone from primary separation. As a precondition for the construction of mentioned facilities in technical-t ...

  • Cu isotope fractionation in primary and secondary copper minerals from Čoka Marin and Bor mining areas (East Serbia).

    Lazarov Marina, Weyer Stefan, Pačevski Aleksandar, Horn Ingo (2011)

  • Contribution to the geotechnical classification of municipal waste landfills in Serbia

    Dragoslav Rakić, Irena Basarić, Laslo Čaki, Slobodan Ćorić (2018)
    Management, Monitoring, Policy and Law, Nature and Landscape Conservation, Geochemistry and Petrology, Waste Management and Disposal,Geotechnical Engineering and Engineering Geology,Water Science and Technology,Environmental Chemistry,Environmental Engineering

  • Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability

    Marija Živković, Dejan Ivezić (2021)
    Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...
    рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија
    ... energy performance (primary energy factor, specific heat consumption per degree day and heating area), the security of energy supply (import dependency, Shannon–Wiener diversification index, the share of renewables) and environmental impact (carbon dioxide emission coefficient). Values of the selected ...
    ... current state of the district heating systems. The use of this renewable energy source should provide primary energy savings of 5% per year, reduction of carbon dioxide emission of 6.5% per year, reduction of import dependency of DH systems of 9.8% and improved diversification of energy sources of 21%. ...
    ... ty are assessed through analysis of key performance indicators to provide deeper insight in energy efficiency, energy security, and carbon dioxide emission of district heating systems (primary energy factor, import dependency index, fuel mix diversification and carbon dioxide emission). Selected ...

  • Fluid inclusion systematics in the Okoška gora polymetallic deposit

    Aleš Šoster, Miloš Velojić, Barbara Potočnik Krajnc, Matej Dolenec (2021)
    ... ((Q1}and primary inclusions assemblages (Q2) have :en identified (Fig. 1). Primary Q2 inclusions are elongated, rounded or they occur in the rmof negative crystals. It can be concluded that they are primary, based on the fact that :semblages follow the growth zones ofthe host crystal. Secondary (Q1) ...
    ... mixing and dilution of the primary mineralizing fluid by seawater or meteoric water. In order to clarify the genetic relationships between the fluid inclusion assemblages, we will perform microthermometry and Ramananalysis, which will provide indisputable evidence ofthe formation conditions of the ...
    ... they formed from a lower temperature flnid and are likely secondary compared o the negative crystal assemblages. The petrographydata for the fluid inclusions suggest the presence of two mineralizing fluids in the system, raising questions about their origin and metallogenetic fertility. The transition ...

  • 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
    ... Stress tensor calculations. and the trend of map-scale structures both imply roughly N-S compression, and sub- ordinate perpendicular extension (Fig.5). Though the stress regime changed from pure compression of D» to transpression of Dx, the shortening directions of the tWo phases do not differ ...
    ... namics and mantle convection: from extension to compression in Africa and a conceptual model for obduction l: Canadian Journal of Earth Sciences, 53, 11, 1190—1204. Karamata, S. (2006). The geodynamical framework of the Balkan Peninsula: its origin due to the approach, collision and compression ...
    ... against that of Kibler's laboratory using 0.25 and 0.42 A%2O as the anchizone boundary values (for details see Arkai and Ghabrial 1997). The illite “crystallinity” (KI = Kiibler index) boundaries of the anchizone correspond to 0.25 and 0.42 A?20O in the present work. On the basis of this cali- ...

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... the o index (I„ >1), the external hazard index (H.. >1) and the internal hazard index (Hi, >1). Those values were approximately twice as high the maximum values recorded after measurement of 265 gypsum samples used as building materials in Serbia (260, 1.30, 0.70 and 1.41 for Ra.g lo Hex and Hina ...
    ... scanning step of 1* min ". The tube current was set to 30 mA and the voltage to 40 kV. The identification of mineral phases followed the criteria recommended by Mikheev (1957) and the Joint Committee for Powder Diffraction Standards (JCPDS). Whiteness index In order to compare the quality of the samples ...
    ... (Costa et al., 2019). Primary impurities in phosphogypsum are phosphates, fluorides, organic substances and alkali metals (Hua etf al., 2016; Walawalkar et al., 2016). The commercial use of phosphogypsum in the areas of agricul- ture, road construction, the cement industry and the manufactur- ing ...

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... SOS1 – ration of net imports and total available primary energy consumption within a given year SOS2 – ration of the stocks of critical fuels and correspond- ing fuel consumption SS1 – ration of re- serves to production SS2 – ration of resources and production D – diversity index of the possible ...
    ... imports and total available primary energy consumption (SOS1) within a given year. The second indicator of SOS is the ration of the stocks of critical fuels and corre- sponding annual fuel consumption (SOS2). The purpose of this indicator is to measure the availability of national stocks of critical ...
    ... indicators measure the share of [8] RES in total primary energy supply (TPES) (RES1) and the share of RES in total final consumption (TFC) (RES2). The TPES is calculated as the sum of primary production and import, less to the sum of export, stock changes, bunkers, and statistical difference [9]. The ...

  • Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia

    Pavle Tančić, Aleksandar Kremenović (2022)
    Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42 Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by com parative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R63c space group. Various polyhedral distortions and structural or derdis or dervariations between the zones studied are also described and discussed. The ...
    Geology