Претрага

Упит dcterms_subject_txt:definition of criteria

2829 items

  • 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
    ... performed by the generally accepted Hoek–Brown, and Mohr–Coulomb failure criteria. Minerals 2021, 11, 813 7 of 19 Figure 6. Triaxial test equipment: (a) Hoek cell and (b) manual confining pressure system for testing. 4. Results of Laboratory Strength Tests 4.1. Uniaxial Compressive Strength—UCS (σci ...
    ... length of 535 m, and the average depth per borehole was 133 m [11]. 3. Methodology of Laboratory Tests of Strength Parameters of Heterogeneous Rock Mass Laboratory tests of UCS and triaxial test were performed on samples of homogeneous material and composite samples, for which formation blocks of undisturbed ...
    ... followed by a zone of altered dacite. The zone of altered dacite (AD) is yellowish due to the pronounced limonitization of biotite. After the altered dacite, there is compact dacite (D) of gray color, porphyry structure with pronounced large phenocrysts of feldspar. Precise determination of the boundary between ...

  • 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
    ... forms. Weathering forms are described with the aid of specific terminology utilizing: morphological and geometrical criteria (Siedal et al. 2011). In the attempt to harmonize classification approaches and overcome termi- nology problems, various systems have been established (Normal 1/88 1990 ...
    ... repeating of cycles of dissolve, wetting-drying and freeze-thaw caused continual increas- ing intensities of decay and very heavy damage in different forms of loss of stone materials (surface recession, relief, and outburst). The present state of the gate is result of the complex action of the ...
    ... rising velocity of decay pro- cesses. All of these sources of moisture/water caused dissolution of poorly cemented algal rudstone and sparite cement of grainstone. It resulted in crumbling, granular disintegration, or occurring of thin white crust on stone surface as consequence of redeposited ...

  • 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)
    ... 3.4. Defining Statistical Criteria For the above-mentioned models 1, 2 and 3, based on experimental data, we have obtained equations, which make possible to determine the oscillation velocities of the rock mass v depending on the reduced distance R. To assess the degree of connection between v and R ...
    ... Parameters through the Application of Quotient of Products of the Same Number of Reduced Distances and Oscillation Velocities According to this model, determination of the parameter n is based on the quotient of the product of equal number of experimental data of the rock mass oscillation velocity v ...
    ... detonation of explosive materials is followed by release of a large amount of energy. Whereby, a greater part of energy is used for rock destruction, and part of energy, in the form of seismic wave, is lost in the rock mass causing rock mass oscillation. Investigations of the character and behavior of the pattern ...

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... lemma of the entry • The part-of-speech of the entry • The sense text, including the definition In order to facilitate the task of annotation, we convert the initial data into spreadsheets. These spreadsheets provided an easy mapping and had the following columns: • The headword and part of speech ...
    ... The selection of the initial set of lemmas and senses to be aligned is guided by the following criteria: • The lemmas should represent all open class words, namely nouns, verbs, adjectives and adverbs. • Another criterion was that the lemmas should repre- sent different degrees of polysemy, i.e ...
    ... matched to; • The full sense text of the second resource. The fifth column played no technical role in the annotation, but was provided for reference, however as it was format- ted with text wrapping on, it allowed the annotators to see the full definition of the second resource. In general we ar- ...

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

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... exploration of uranium and copper-gold deposits, prospection criteria development for geological exploration of precious, base metals and copper ores of Serbia, metallogenic analyses of metallic raw-materials of Serbia as well as regional metallogenic analysis and construction of prognostic and ...
    ... Law on Environmental Protection (Official Gazette of the Republic of Serbia No. 135/04), Bylaw on Limit Values, Methods of Imission Measurements, Criteria for Posting Measuring Stations and Collecting Data (Official Gazette of the Republic of Serbia No 54/92), Bylaw on Emission Limit Values, Methods ...
    ... i kvalitet zrna ozime pšenice. [The impact of the year on yield and grain quality of winter wheat. Journa! of Institute of PKB Agroekonomik, Belgrade, Serbia., Vol. 27, 1-2, 79-86]. Evans, L. T. & Fischer, R.A. (1999). Yield potential: Its Definition, Measurement, and Significance. Crop Sci. ...

  • Анализа могућности примене метода повећања степена искоришћења на нафтном лежишту "Ј"

    Иван Савић (2024)
    Комплексно лежиште „Ј“ је сачињено од колектор стена различите стратиграфске припадности и хетерогеног литолошког састава. Лежиште се налази у последњој фази разраде, а током животног века експлоатисано је само примарним методама. У раду је приказана анализа стања разраде лежишта, а као основни фактори који су допринели ниском степену искоришћења лежишта издвојени су вискозност нафте, хетерогеност колектора и пад лежишног притиска. Изведена је хидродинамичка симулациона студија помоћу које је издвојена најпогоднија зона за пилотну примену терцијарних метода. Коришћењем „скрининг“ критеријума ...
    Вискозност, хетерогеност, полимери, термичке методе
    ... Analysis”, SPE Reservoir Evaluation&Engineering, 2016 11. Taber, J.J., Martin, F.D., Seright, R.S., “EOR screening criteria revisited - part l: introduction to screening criteria and enhanced recovery field projects”, SPE Reservoir Engineering, August 1997 49 O0pasau 1 H3JABA O ...
    ... радовима запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository ...
    ... July 2022. 8. M. Delshad, D. H. Kim, O. A. Magbagbeola, C. Huh, G. A. Pope, F. Tarahhom. “Mechanistic interpretation and utilization of viscoelastic behavior of polymer solutions for improved polymer-flood efficiency”, Improved Oil Recovery Symposium, Tulsa, Oklahoma, USA (24—28 April 2008). ...

  • Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species

    Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)
    Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...
    microstructure, microwave-hydrothermal synthesis, adsorption, magnetic nanoparticles, arsenic

  • Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)

    Pavle Tančić, Aleksandar Kremenović, Predrag Vulić (2019)
    In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...
    grandite, XRPD, crystal structure, structural dissymmetrization

  • Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia

    Predrag Radović, Miloš Radonjić, Emmanuel Billia (2020)
    Finds of Pleistocene rhinoceros are rare in Serbia, and only one species (the woolly rhinoceros Coelodonta antiquitatis Blumenbach, 1799) has been reported so far. The current paper presents the dental material of an extinct so-called Hundsheim rhinoceros, Stephanorhinus hundsheimensis Toula, 1902 from Bogovina Cave (East ern Serbia). Both the morphological and metric characteristics of the teeth are consis tent with the attribution to S. hundsheimensis. Unfortunately, the rhinoceros material originated from an uncertain geological context, so there is no ...
    rhinoceros, Stephanorhinus hundsheimensis, Serbia
    ... (e.g., DP4 for deciduous upper fourth premolar). RESULTS Systematic Palaeontology The taxonomical position of Stephanorhinus hundsheimensis is as follows (in compliance with the criteria proposed by McKenna and Bell, 1997, except for the genus): Class MAMMALIA Linnaeus, 1758 Subclass THERIA Parker ...
    ... Geographical and geological location of Bogovina Cave. A) Terrain in the vicinity of Bogovina Cave with simplified geological map (after Veselinović et al., 1964). Elevation of the terrain is exaggerated several times. B) Posi- tion of Bogovina Cave in the central part of the Balkan Peninsula. PALAEO- ...
    ... or crista. The base of the protoloph is rather bulbous, which is more evident in the lingual view; there is a strong con- striction of the protocone. The outlet of the lingual valley shows an enlarged V-shape in lingual view. The enamel surface shows the presence of a large number of vertical and subvertical ...

  • 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

  • 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
    ... event in our study area which is in agreement with the direction of ophiolite obduction determined on the basis of stretching lineations and shear criteria in the sub- ophiolitic melange and in the mylonitic metamorphic sole of the ophiolites (Carosi et al. 1996; Karamata et al. 2000; Schmid ...
    ... 1 Introduction Emplacement of oceanic crust on top of continental mar- gins has been an object of particular interest since the observation of the large volumes of ophiolitic complexes exposed in Eurasia (Goffć et al. 1988; Robertson 2004). The understanding: of ophiolite obduction has been ...
    ... Petrology of low metamorphosed rocks of the central part of the Drina-Ivanjica Paleozoic: Bu//. Mus. Hist. Nat. Belgrade, A, 39, 13-139. Milovanovic, D., Marchig, V., and Stevan, K., 1995, Petrology of the crossite schist from Fruška Gora Mts (Yugoslavia), relic of a subducted slab of the Tethyan ...

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... Ristović, I.; Djokić, J. Application of a Method for intelligent multi-criteria analysis of the environmental impact of tailing ponds in northern Kosovo and Metohija. Energies 2016, 9, 935. [CrossRef] 5. Institute IMS ad. Certificate of Determining the Nature of Waste CPO No. 016/07 (2007); Institute ...
    ... formation of the oxides and releasing of the water molecules during activation reactions or due to carbonization as well as decomposition of oxygen-containing functional groups at a high temperature [56–58], while presence of insignificant amounts of nitrogen can be a consequence of lagging of nitrogen ...
    ... which is equal to peaks intensity ratios of D– and G–bands (ID/IG). The ID/IG value is a measure of the crystallinity of the sample. The increase of its value corresponds to decrease of the crystallinity of the sample and vice versa [47,54]. From the literature [55] the ID/IG value lower than 0.25 indicated ...

  • Методологија интегралне анализе сценарија енергетског развоја

    Александар Маџаревић (2019)
    енергетска безбедност, сценарио развоја, фази логика, сигурност снабдевања, доступност, расположивост, природни гас
    ... and social criteria. The dissertation contributed to overcoming the inconsistencies in the assessment of the energy development scenarios, which resulted from the partial review of the interaction of energy development with the economic, ecological, social and institutional aspect of development ...
    ... 2015 Volume 48, pp. 585-607 Zadeh, L.A., The concept of a linguistic variable and its application to approximate reasoning, III Information Sciences, 1975, Volume 9 (1), pp. 43-80 Buckley, J.J., The multiple judge, multiple criteria ranking problem: A fuzzy set approach, Fuzzy sets and systems ...
    ... Prirodno matematički fakultet Novi Sad, 1999 Bortolan, G., Degani, R., A review of some methods for ranking fuzzy subsets, Fuzzy sets and systems, Volume 15, 1985, pp. 1-19, Konidari, P., Mavrakis D., A multi-criteria evaluation method for climate change mitigation policy instruments, Energy Policy ...

  • Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина

    Aлександар Додеровић (2024)
    Површинска експлоатација минералних сировина захтијева претходно откопавање значајних( милионских) количина јаловине, које је неопходно транспортовати до локације на којој ће сеона трајно одложити. Традиционални приступ избора локације и дизајна одлагалишта се карактерише парцијалним приступом, заснованом на анализи неколико водећих критеријума као и на личном искуству инжењера, често занемарујући синергетски ефекат осталих утицајних фактора Технолошке операције које се односе на манипулацију јаловином, међу којима предњачи транспорт, генеришу највећи дио трошкова у површинској експлоатацији. Такође, цјелокупан процес експлоатације додатно је ограничен ...
    оптимизације завршне контуре одлагалишта, хибридни модел, површинска експлоатација, генетски алгоритам

  • 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
    ... J., 2009: Selection of the Method of Coal Exploatation According to the Environmental Protection Criteria. Balkanmine, Izmir, Turska. GRUJIĆ M., 2009: Transfer of Technologies in Serbian Mining Through History. Konferencija IRSE 09, Fruška Gora. GRUJIĆ M., 2010: Selection of an Optimal Solution ...
    ... elements for setting-out in horizontal plane of conveying chambers at the bauxite mine „Kosturi“ Srebrenica, Archives of Mining Sciences, 2014. 263. Grujić M., Ivezić D., Živković M.: Application of multi-criteria decision- making model for choice of the optimal solution for meeting heat demand in ...
    ... površinu. Podzemni radovi, 6, 33–36. TORBICA S., NENADIC D., 1998: Rupture System of Rock Massif in the Orebody “Borska Reka” and its Influence on Definition of Excavation Construction. Scientific Symposium, University of Petrosani, Romania, 08-09.X. 1998. 4. СПИСАК ИЗАБРАНИХ НАУЧНИХ И СТРУЧНИХ РАДОВА ...

  • Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa

    Mirjana V. Banković (2018-07-13)
    Profitabilna eksploatacija sve složenijih ležišta je težak zadatak koji zavisi odtemeljnog procesa analize, planiranja i projektovanja rudnika. Izvodljiv strateškiplan mora da zadovoljava društvena, regulatorna, tehnološka, geometrijska iekonomska ograničenja. Kako bi se postigao osnovni cilj, odnosno profitabilnost iodrživost rudarskog projekta na duži period, neophodno je unapređenjematematičkih modela i informatičke podrške procesima planiranja i optimizacijekoji će omogućiti efikasnu realizaciju ovih ciljeva...
    tehnološki model, integralni model, planiranje, optimizacija,utovarno-transportni sistem, neto sadašnja vrednost projekta
    ... 1995, Environmental impact of metals derived from mining activities: processes, predictions, prevention. Journal of Geochemical exploration, 52 (1-2), 5-23. 203 Samanta, B., Sarkar, B., Mukherjee, S., 2002, Selection of opencast mining equipment by a multi-criteria decision-making process. Mining ...
    ... assets to determine maximum fleet size. A case study history of Glamis Gold's Operation. Bazzazi, A. A., Osanloo, M., Karimi, B., 2011, A new fuzzy multi criteria decision making model for open pit mines equipment selection. Asia-Pacific Journal of Operational Research, 28 (03), 279-300. Bell, F. G., Donnelly ...
    ... Rudarski institut. Soltanmohammadi, H., Osanloo, M., Sami, A., Malekzadeh, S. B., 2010, Selection of practical bench height in open pit mining using a multi-criteria decision making solution. Journal of Geology and Mining Research, 2 (3), 48-59. Stevanović, D., 2015, Optimizacija i planiranje površinskih ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... decision support systems. This is necessary because automatic wells produce hundreds or thousands of logs daily. Therefore, in addition to standards that indicate severe 70 equipment faults, other criteria allow the well to continue production. However, it is crucial to identify production losses ...
    ... The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs University of Belgrade Faculty of Mining and Geology Master ...
    ... stroke length of the smooth rod. Key structural components of the horsehead include the balance beam, the connecting rod (cam mechanism), the adjustment rod, counterweights, a gearbox, and a driving electric motor. The length of the adjustment rod, number of strokes, and the stroke length of the smooth ...

  • 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
    ... mineralization via injection of CO-»-enriched fluids into formations. Storage of a total of 125 Gt CO» would result in a capital input of approximately 1—4 trillion dollars in total and 10—50 billion dollars per year until 2100. The cost of mitigating the effects of CO- could rise significantly by ...
    ... rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs University of Belgrade Faculty of Mining and Geology Final ...
    ... the CO-. The rate of dissolution depends on the amount of mixing of CO- and formation water. Diffusion of CO into the water is assisted by accumulations with a high surface area to volume ratio, such as in thin but widespread layers in the formation. Similarly, the presence of internal permeability ...

  • 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