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Упит dcterms_subject_txt:Earth-Surface Processes

360 items

  • 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 ...

  • 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

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

    Иван Обрадовић, Александра Томашевић, Ранка Станковић, Биљана Лазић (2017)
    ... маркер +Mining+Surface означавао појмове који припадају домену рударства и поддомену површинска експлоатација. У табели 2 приказани су постојећи и новопредложени доменски маркери значајни за област рударства. Табела 2. Поддоменски маркери из области рударства Маркер Опис Примери +Surface Површинска ...
    ... flexical markers for that specific domain is critical to the quality of there sponse. This paper discusses the importance of lexical mark- ers in the processes of information retrieval and extraction, and proposesanexpansion of the set of the semarkers for the field of mining. A brief description of the ...

  • XRD dertermination od hydrothermal phases related to epithermal mineralization in the Čukaru Peki deposit

    Dragana Bosić, Vladica Cvetković, Miodrag Banješević, Kristina Šarić (2024)
    Čukaru Peki, epithermal mineralization, hydrothermal alterations

  • Еволуција напонског поља подручја Интерних Динарида у Србији током алпске орогенезе

    Ana S. Mladenović (2015-06-19)
    Циљ ове докторске дисертације био је реконструкција еволуције напонског пољаЗемљине коре у подручју Интерних Динарида у Србији током Алпске орогенезе.Истраживања за потребе решавања овог проблема су изведена у два дела. Првидео обухватао је анализу палеонапона на дефинисаном подручју истраживања,док се други део односио на анализу тренутно активног поља напона у овом делуБалканског полуострва. Истраживано подручје обухвата унутрашњи деоДинарског орогеног појаса, који се простире у централној и западној Србији. Собзиром на циљ истраживања, истраживано подручје је дефинисано тако даобухвата три ...
    Интерни Динариди, анализа палеонапона, фокални механизмиземљотреса, напонско поље, тектоно-магматски догађаји
    ... 279 – 286 Poli G., Tommasini S., Halliday A.N. 1996. Trace elements and isotopic exchange during acid – basic magma interaction processes. Trans R Soc Edinburgh, Earth Sci 87: 225 – 232 Pomella H. 2014. Magnetic fabric of brittle fault rocks. Geophysical Research Abstracts (EGU). 16: 12505 Prelević ...
    ... Reconstructing the Alps – Carpathians – Dinarides as a key to understanding switches in subduction polarity, slab gaps and surface motion. International Journal of Earth Sciences 104 (1): 1 – 26 Heidbach O., Tingay M., Barth A., Reinecker J., Kurfeß D., Müller B. 2008. The World Stress Map ...
    ... it is not clear yet whether the extension within the Internal Dinarides is the result of interference of these two processes, or it was driven by different tectonic processes in the northern and southern part of our research area. Early to Late Miocene orogen parallel extension (NW – SE) is ...

  • Еволуција напонског поља подручја Интерних Динарида у Србији током алпске орогенезе

    Ana S. Mladenović (2015-06-19)
    Циљ ове докторске дисертације био је реконструкција еволуције напонског пољаЗемљине коре у подручју Интерних Динарида у Србији током Алпске орогенезе.Истраживања за потребе решавања овог проблема су изведена у два дела. Првидео обухватао је анализу палеонапона на дефинисаном подручју истраживања,док се други део односио на анализу тренутно активног поља напона у овом делуБалканског полуострва. Истраживано подручје обухвата унутрашњи деоДинарског орогеног појаса, који се простире у централној и западној Србији. Собзиром на циљ истраживања, истраживано подручје је дефинисано тако даобухвата три ...
    Интерни Динариди, анализа палеонапона, фокални механизмиземљотреса, напонско поље, тектоно-магматски догађаји
    ... 279 – 286 Poli G., Tommasini S., Halliday A.N. 1996. Trace elements and isotopic exchange during acid – basic magma interaction processes. Trans R Soc Edinburgh, Earth Sci 87: 225 – 232 Pomella H. 2014. Magnetic fabric of brittle fault rocks. Geophysical Research Abstracts (EGU). 16: 12505 Prelević ...
    ... Reconstructing the Alps – Carpathians – Dinarides as a key to understanding switches in subduction polarity, slab gaps and surface motion. International Journal of Earth Sciences 104 (1): 1 – 26 Heidbach O., Tingay M., Barth A., Reinecker J., Kurfeß D., Müller B. 2008. The World Stress Map ...
    ... it is not clear yet whether the extension within the Internal Dinarides is the result of interference of these two processes, or it was driven by different tectonic processes in the northern and southern part of our research area. Early to Late Miocene orogen parallel extension (NW – SE) is ...

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... Recovery of rare earth elements from coal fly ash through sequential chemical roasting, water leaching, and acid leaching processes. Journa! of Cleaner Production, 284, p.124725. [179] Demol, J., Ho, E. and Senanayake, G., 2018. Sulfuric acid baking and leaching of rare earth elements, thorium ...
    ... Ghahreman, A., 2017. A review on the cracking, baking and leaching processes of rare earth element concentrates. Jourma! of rare earths, 35(8), p.739-752. [184] Stoy, L., Diaz, V. and Huang, C.H., 2021. Preferential recovery of rare-earth elements from coal fly ash using a recyclable ionic liquid. ...
    ... COPIIIHOHO- COPIIIHOHO- cenapanuje KariJtapHH TOK KanJiapHH TOK Hseop: Ta60ena je npeyaema u3 paoa: Recovery of rare earth elements from waste streams using membrane processes: An overview, Elkhansa Elbashier, Afnan Mussa, MhdAmmar Hafiz, Alaa H. Hawari, p: 204 54 Ta0ena 10. PesuMe no0oamaka ...

  • 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

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... queries issued by the learning platforms. Basically, the web service receives the query from the web application and invokes LeXimirCore, which processes the query. Using the available resources, the system can expand the query morphologically, which is especially important for Serbian, due to ...

  • Improvement of geodatabase queries within GeolISS

    Ranka Stanković (2008)
    ... sources. Vector data are more compatible with the relational database environment. They can be part of a relational table as a normal column and processes using a multitude of operators. The space required for storage and sharing of vector data is usually much smaller than the space required for raster ...
    ... structures, faults, fold access, dyke or vein. − Two-dimensional polygons are used for geographical features that cover a particular area of Earth's surface. Such features may include lakes, park boundaries, buildings, city boundaries, or land uses. Each of these geometries is linked to a row in a ...
    ... object search for geologic unit outcrop ‘IzdanakKartiraneJedinice’, but in general it can be used for any spatial entity: borehole, well, geologic surface path etc. The user selects among the search criteria offered, in our example, for the geologic unit ‘Kartirane jedinice’ (table with description ...

  • Data from the Digital Repository of the Faculty of Mining and Geology in eScience (eNauka)

    Biljana Rujević, Mihailo Škorić (2024)
    The paper describes linking the Digital Repository of the University of Belgrade, Faculty of Mining and Geology, with the eScience system in terms of transferring metadata about the results of researchers' scientific work. The steps taken to ensure a smooth harvesting of metadata are outlined. Additionally, a presentation of additional improvements to the OAI system is provided, aiming to contribute to the automatic linking of authors with their results in the eScience system.
    репозиторијуми, еНаука, метаподаци, Рударско-геолошки факултет

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • A new polymorph of Ba(AsO3OH): Synthesis, crystal structure and vibrational spectra

    Tamara Đorđević, Ljiljana Karanović (2010)
    A new monoclinic polymorph of Ba(AsO3OH) was synthesized under hydrothermal conditions. It represents a previously unknown structure type. Its crystal structure was determined from a racemic twin using single-crystal X-ray diffraction data collected at 120 and 293 K [space group P21, a=7.2149(14)/7.2370(2), b=7.7028(15)/7.7133(2), c=21.7385(43)/21.8079(5) Å, β=95.95(3)/96.073(1)1, V=1201.6(4)/1210.51(5) Å3, Z=12]. The crystal structure of P21-Ba(AsO3OH) has a layered character and is built up of four types of regularly alternating layers parallel to (0 0 1). Every AsO3OH tetrahedron is chelating to two Ba atoms and ...
    Ba(AsO3OH), хидротермална синтеза, структурна анализа монокристала, Раманска спектроскопија, инфрацрвена спектроскопија, водоничне везе, хидрогенарсенати земноалкалних метала

  • Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude

    Ivana M. Jovanović (2016-01-13)
    U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...
    flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže
    ... The empirical prediction of bubble surface area flux in mechanical flotation cells from cell design and operating data. Minerals Engineering, Vol. 12, No. 3, pp. 309-322 84. Gouws, F.S., Aldrich, C., 1996. Rule-Based Characterization of Industrial Flotation Processes with Inductive Techniques and Genetic ...
    ... Advanced Modelling of Complex Processes by Rule Based Networks. In: Proceedings of 5th IEEE International Conference on Intelligent Systems, 7-9 July, London, UK, pp. 197–202 78. Gegov, A., Petrov, N., Vatchova, B., Sanders, D., 2011. Advanced Modelling of Complex Processes by Fuzzy Networks. WSEAS ...
    ... , 2012, Recent Advances in Modeling, Simulation, and Control of Mineral Processing Operations. In: Separation Technologies for minerals, coal and earth resources (Edited by C.A Young and G.H. Luttrell), SME, pp. 667–680. 102. Hernáinz, F., Calero, M., 1996. Flotation rate of celestite and calcite ...

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...
    ... compatible computer systems. The object-oriented approach in system structuring and modeling1 was used as the strategy for defining the model of processes and data in the development of INVENTS. In this paper, UML (Unified Modeling Language) as a standard language for visualization, specification, ...
    ... obtain efficient communication between the symbolic and the numerical part of the system. In order to cope with this prob- lem a separation of processes in coupled systems into independent modules is sug- gested. Furthermore, information interchange, i.e. communication among modules, is strictly ...

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... shock, i.e., rock mass vibration. Shock or rock mass oscillation can be a consequence of natural processes or human activities (in the performance of mining). Measurements and monitoring of seismic processes can be done in different ways, depending on the cause of the shock [1]. Intensity of the shock ...

  • 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

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods