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Упит dcterms_subject_txt:Economics and Econometrics

2340 items

  • 3D modeling and monitoring of karst system as a base for its evaluation and utilization: a case study from eastern Serbia

    Saša Milanović, Zoran Stevanović, Ljiljana Vasić, Vesna Ristić-Vakanjac (2013)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... design influence the efficiency and economics of adsorption processes such as pressure/temperature swing adsorption. [32] Metrics for adsorption capture include high working capacity and selectivity, low cost, low regeneration requirements, long-term stability, and fast kinetics. Although adsorption- ...
    ... Acceptance of CO2 Capture, Storage – Economics, Policy, and Technology: Summary of the Main Findings and Key Recommendations available at http://www.accsept.org. [11] Ali Khan MH, Daiyan R, Neal P, Haque N, MacGill I, Amal R. A framework for assessing economics of blue hydrogen production from steam ...
    ... however the challenges lie on the economics, safety and technical expertise involved. The IPCC special report on CCS in 2005 estimates the worldwide technical potential for storage in geological formation to be at least 2000 Gt CO» [51]. Carbon capture utilization and storage is reducing: CO> emissions ...

  • ‘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

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... morphology, and syntax. Some of the functions are:  developing and applying electronic dictionaries of simple words and multi-word units;  pattern matching with queries in form of regular expressions and graphs;  text transformations;  processing of monolingual and bilingual texts ...
    ... conditions in terms of cultural and educational needs. [1] Within BAEKTEL (Blending academic and entrepreneurial knowledge in technology enhanced learning) project an open education platform is being developed, for collecting and sharing resources among academic and entrepreneurial institutions ...
    ... 2. COMPUTATIONAL LINGUISTICS AND NATURAL LANGUAGE PROCESSING Computational linguistics (CL) is a theoretical discipline between linguistics and computer science concerned with understanding and modelling the written and spoken language from a computational aspect.[3]Natural ...

  • Terminological and lexical resources used to provide open multilingual educational resources

    Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić (2016)
    Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...
    otvoreni obrazovni resursi, leksički resursi, obrada prirodnih jezika, terminologija
    ... (NLP) has a two-faceted approach to education where one involves e-learning and computer-assisted learning and instruction and the other consists of NLP tools for analysis and use of language by machines [1]. The usage and application of the research done in the field of the NLP has been present ...
    ... insufficient interaction and feedback. These tools help overcome these hurdles at an advantage for both students and educators. The model of digital education also allows for a modern peer-to-peer education where students educate themselves and each other, exploring, developing and building skills without ...
    ... engineering and statistics, as we go more in-depth, experts from more narrow fields are required. For example, NLP tools for language learning must connect to Second Language Acquisition (SLA) and Foreign Language and Teaching (FLTL) research with insights from Cognitive Psychology and Empirical ...

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... BETWEEN DYNAMIC CBR AND COMPACTION AND BEARING CAPACITY OF PAVEMENT FOUNDATION LAYERS UDC 624.158 M. Bogdanović,!* S. Bogdanović,? D. Rakić,? and I. B. ikodinović? !TPA for quality assurance and innovation, Belgrade, Serbia, ?University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia ...
    ... the strength of a material, and depends on factors such as the grain size distribution, shape, and roughness of the grain, water content, and compaction, and can be expressed in the range of 20% < CBR, < 150% [6]. A CBR, test can be performed in the laboratory (CBR,) and in situ (CBR+p) (Fig. 1). ...
    ... Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Correlation Between Dynamic CBR and Compaction and Bearing ...

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    multi-criteria decision-making, definition of criteria, underground exploitation

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... stability analysis and detailed design solutions. Author Contributions: Conceptualization, V.R.; methodology, V.R. and V.Č.; validation, V.M., D.S. and N.Ž.; formal analysis, V.R. and V.Č.; investigation, V.R., V.Č., V.M., D.S. and N.Ž.; resources, V.R. and V.Č.; data curation, V.M., D.S. and N.Ž.; writ ...
    ... specimens and discs were then cut, polished, and shaped to the required height and diameter ratio with tolerances according to the American Society for Testing and Materials—ASTM [17] (Figure 3). Due to the previously shown procedure, monolithic rock material (100% D and 100% AD) specimens and discs of ...
    ... base mass and phenocrysts of quartz, plagioclase, sanidine, biotite, and hornblende. The accessory ingredients are apatite, zircon, and metallic minerals, while the secondary minerals are calcite, sericite, chlorite, and iron oxides/hydroxides. Mineralogical-petrographic analysis of D and AD samples ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... transport, storage and treatment of mineral resources and the working of quarries). According to the Serbian Law on Mining, technical and biological reclamation and spatial arrangement must be performed with the purpose of environmental protection, regeneration, land reclamation and arrangement of the ...
    ... quality preservation of land and water resources and to designate reclaimed land for a new purpose. This article presents an overview of the ranking most popular methods of land recultivation and possibilities of reclaimed land after the completion of reclamation and closure of the coal mine. Keywords: ...
    ... IN KU AND SERBIA Europe-wide harmonized system and international platform for collecting, assessing: and mapping the environmental data concerning coal mining activities is still missing in contrast to the sociO-economic concern. The same can be applied to the quality land reclamation and follow-up ...

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... described and tagged in a standard way, and in machine readable form. This makes resources more easily located by search engines, and results returned by are more relevant. Both educators and learners can find and compare described and tagged learning materials more efficiently, and select the ...
    ... mathematics and informatics at the University of Belgrade Faculty of Mining and Geology and director of the University of Belgrade Center for e-learning and distance education. He has published four books and more than 130 scientific papers related to artificial intelligence methods and tools, language ...
    ... materials openly and freely to educators, students, and self-learners to use and reuse for teaching, learning, and research, under an open source license (Bissell, 2009). The worldwide OER community established the Open Education Consortium, with hundreds of higher education institutions and associated ...

  • Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

    Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar (2019)
    keramika, glina, Dobrodo, mineralogija, sirovina, Srbija

  • EUROLAN 2021: Introduction to Linked Data for Linguistics Online Training School

    Milan Dojchinovski, Julia Bosque Gil, Jorge Gracia, Ranka Stanković (2021)
    Prva škola za obuku polaznika koju je organizovala COST akcija NexusLinguarum održana je od 8. do 12. februara 2021. godine sa ciljem da studenti, istraživači i stručnjaci nauče osnove lingvističke nauke o podacima. Tokom obuke polaznici su se upoznali sa širokim spektrom tema: od semantičkog veba, RDF -a i ontologija, do modeliranja i pretraživanja jezičkih podataka pomoću najsavremenijih ontoloških modela i alata. Škola je održana u okviru serije letnjih škola EUROLAN-a i organizovalo ju je virtuelno (onlajn) nekoliko instituta; ...
    nauka o lingvističkim podacima, povezani podaci u lingvistici, jezički podaci, EUROLAN, NexusLinguarum, COST akcija, škola za obuku
    ... linguistics and natural language processing (NLP). The goal of this 15th EUROLAN School was to bring together scholars, teachers and students of linguistics, NLP and information technology to discuss the principles and best practices for repre- senting, publishing and linking linguistic data and the issues ...
    ... on February 8-12, 2021 and was aimed at students, academics, and practition- ers wishing to learn the basics of Linguistic Data Science. During the training school, the participants were introduced to a wide range of topics: from Semantic Web, RDF and on- tologies, to modeling and querying linguis- tic ...
    ... training school was aimed at promoting and teaching the basics of linguis- tic data science and the related technologies to people from the academia and the industry. It was organized under the umbrella of the EUROLAN series of summer schools, which was established in 1993 and covers topics that are particularly ...

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... pancreatic phospholipase A2 and [RuCl2(bipy)2]Cl (A) or [PtCl4(bipy)] (B). Peaks of interest are labeled: 486.3 and 490.3 for proton and sodium adducts of LPC 14 : 0 used as internal standard; 496.3 and 518.3 for proton and sodium adducts of LPC 16 : 0; 760.6 and 782.6 for proton and sodium adducts of PC ...
    ... pancreatic phospholipase A, and [RuCl,(bipy)s|Cl (A) or [PtCl(bipy)] (B). Peaks of interest are labeled: 486.3 and 490.3 for proton and sodium adducts of LPC 14:0 used as internal standard; 496.3 and 518.3 for proton and sodium adducts of LPC 16:0; 760.6 and 782.6 for proton and sodium adducts of PC 16:0 ...
    ... A2 for 0, 1, 2, 5, 15 and 60 min. Labeled peaks belong to the following ion species: m/z = 760.6 and m/z = 782.6 for proton and sodium adducts of PC 16 : 0, 18 : 1, respectively; m/z = 496.3 and m/z = 518.3 for proton and sodium adducts of LPC 16 : 0, respectively. Proton and sodium adducts of internal ...

  • 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
    ... intercept is 0.067 and represents the mean influence of the initial composition of the biomass and the changes due thermal degradation. Decarboxylation and decarbonylation result in lower O/C and higher H/C, dehydrogenation in lower H/C and demethanization in lower H/C and higher O/C. Evolution ...
    ... a broad double peak for amorphous carbon between 5 and 29". In addition, HW500f shows sharp intense peaks of quartz and small peaks for Whewellite (Ca(C>Ox)·H»O) at 24.38* and 14.86* (3.650 and 2.987 A) [53] and calcite. The presence of Si and Ca is consistent with the chemical composition (Table ...
    ... vibrations [85] and may contain overlapping peaks of oxygen functional groups (few oxygen content here). The bands at 873 (untreated) and 872 (treated), 808 (untreated) and 809 (treated) and 748 cm ”' (treated and untreated) for aromatic out-of-plain CH deformation [85,94] are well resolved and relatively ...

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... N.Ć.I. and A.V.; methodology, D.M. and A.V. (hydrogeol- ogy and energy resources); N.Ć.I. and D.I. (architecture and energy needs), validation, D.I. (energy efficiency); investigation, D.M. and A.V.; resources, A.V. and O.K.; writing—original draft preparation, N.Ć.I. (architecture and energy needs) ...
    ... sizing and positioning of open-air and indoor features, • passive design, and • use of on-site renewable energy sources. The general concept was developed with south-facing wellness and spa/medical units and corresponding utility spaces in the centre with optional additions of hospitality and medical ...
    ... of auxiliary and technical spaces are planned according to the final capacity, and the modular units and adjacent programs (medical and hospitality) are executed in stages. (2) Open development: The majority of auxiliary and technical spaces are planned according to initial capacity, and the main layout ...

  • The ‘Umka’ landslide

    Uroš Đurić, Dragana Đurić, Miloš Marjanović, Biljana Abolmasov, Ivana Vasiljević (2024)
    We present an in-depth landslide map of the ‘Umka’ landslide near Belgrade, Serbia, at a scale of 1:5000. The map delineates elements at risk, primarily buildings and road infrastructure impacted by the landslide displacements of several cm per year, introduced during frequent reactivation stages. The Main map results from a survey of over 350 buildings and more than 7 km of state and local roads. The acquisition techniques included engineering geological field mapping, building survey, and visual interpretation of ...
    rizik od klizišta, elementi rizika, kartiranje pomoću drona, ispitivanje objekata, geotehnički monitoring

  • Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

    Maja Milošević, Biljana Đorđević, Mihovil Logar (2020)
    калцит, сирова глина, традиционална керамика, Злакуса
    ... essential to defining the properties of green pastes during drying and firing (Rivi & Ries, 1997; Milošević et al, 2019a). The tested CIMx and ClIBd samples contain 86.3 and 32.9 wt.% of clay, 10.8 and 6.4 wt.% of silt and 2.8 and 60.6 wt.% of sand fractions, respect- ively. The particle analysis ...
    ... limestone and dolomite [ Sandstone,shale, marl, and limestone Quartz conglomerate, sandstone quartz breccia, and siltstone 'Sandstone, slate, and phyllite Metasandstone Piedmont deposits Alluvium Microfauna Research area Lat: 43.7883000 Lon:19.9884700 Fig. 1. Geographical (left) and geological ...
    ... (LCPC, 1987) and calculated according to Atterberg (1911). Results and discussion Chemical composition 'The chemical composition of the CIMx indicates that the raw clay material used for the ceramic production consists mainly of AL,}O, (~16 wt.%) and SiO> (~57 wt.%) and minor CaO, KO and TiO» (Table ...

  • 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
    ... 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 ...
    ... damage indices (Fitzner and Heinrichs 2002). Pro- posed linear and progressive damage indices and mapping results enable: @ Springer Environ Earth Sci (2015) 73:6181–6193 Quantification of damage intensities and damage cat- egories that allow conclusive quantification and rating of stone damage ...
    ... stone and assess degradation rate over the past 7 years. Documentation created in 2007 was compared with the stone condition by direct examination in situ and also by taking new photographs and comparing old and new photo documentation. Changes in final damage cate- gories were noted and mapped ...

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

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... 2. EVALUATION OF PROGRAM AND PROJECTS The scientific debate on the evaluation of projects becomes more and more interesting in light of the large economic investments in projects and programs, and the difficulty of assessing the genuine and effective economic and social returns. This issue ...
    ... 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 and design, their implementation and management, their effects and their efficiency [4]. Evaluation is a cognitive ...
    ... effects and impacts, on individuals and organizations, to support the applicant in the design phase. This last purpose is increasingly important for all the stakeholders of e-learning projects (i.e. universities, companies, communities, as well as students and employees), due to a global and highly ...

  • Debris-flow Susceptibility Assessment in Flow-R: Ribnica River Case Study

    Ksenija Micić, Miloš Marjanović, Biljana Abolmasov (2024)
    Debris flows are among the most dangerous erosional geohazards due to the fast rate of movement and long runout zones. Even though the initiation can be triggered in mountainous areas, inhabited and with steep slopes, their propagation and deposition can endanger not only buildings and infrastructure in the urbanized areas, but also threaten human lives. As these initiation areas usually represent unattainable terrains with rapid vegetation cover development, field observations and aerial photo analysis become high-demanding tasks. Consequently, medium-to-regional ...
    tečenje drobine, Flow-R, procena podložnosti, empirijski model