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Упит dcterms_subject_txt:laboratory tests

135 items

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... samples. The laboratory tests were per- formed according to current national standards at tWO equally credible laboratories: the Laboratory of the High- way Institute (Laboratory for Stones and Stone Aggregates) and the Institute for Testing: of Materials-IMS Institute (Laboratory for Stones ...
    ... majority of examined rocks belong to pure limestones. Technical properties of observed limestones As shown in the results of the physico-mechanical tests (Table 1) and basic statistical analyses (Fig. 4), all of the limestone samples exhibit relatively uniform values of mechanical properties, but ...

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... 24 0.33 0.03 2.81 1.35 624 562 423 429 6 Čepelica K 18 0.93 0.86 0.28 0.07 5.64 4.94 606 574 423 423 0 Table 2 Results of Rock-Eval analytical tests after extraction. Note the last column showing the temperature shift due to bitumen cracking (∆T max). * T – Triassic; J – Jurassic, K – Cretaceous ...
    ... total organic carbon (TOC, wt.%) content is over 0.45% in all samples analysed. The Triassic samples (No. 1-4) Table 2 Results of Rock-Eval analytical tests after extraction. Note the last column showing the temperature shift due to bitumen cracking (AT max). Sl 82 HI Locality | Age*| Sample |__'OC | me ...
    ... Cretaceous sample. Besides the observed increase of T max a�er solvent extrac- tion (Tab. 2), an additional conclusion from the Rock-Eval extraction tests is that the standard, procedural temperature of 300 °C is obviously not su�cient for obtaining accurate S1 (and hence S2) values from the surface ...

  • A Description of Morphological Features of Serbian: a Revision using Feature System Declaration

    Cvetana Krstev, Ranka Stanković, Vitas Duško (2010)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    Morphology, Lexicon, lexical database, Standards for LRs
    ... between categories and their values as well as their applicability we have used feature structure constraints with conditional and bi-conditional tests. For instance, feature structure for nouns consists of nine features, five of which are present as attributes in MULTEXT-East: type, grammatical ...

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... important. Given that the natural language used by miners and geologists is most suited for relaying: knowledge and expressing; opinions, the paper tests a fuzzy optimization methodology that uses linguistic variables. Consequently, extent analysis is applied to fuzzy AHP by means of triangular fuzzy ...

  • 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

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... terrace gravels of various grain sizes in both A hydrogeological model of the open-cast mine… 47 vertical and horizontal directions. Well pumping tests have been conducted and the hydraulic conductivity found to range from 6x10-5 m/s to 6x10-4 m/s. The intermediate aquifer comprised of sands is ...

  • 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

  • Towards translation of educational resources using GIZA++

    Ivan Obradović, Dalibor Vorkapić, Ranka Stanković, Nikola Vulović, Miladin Kotorčević (2016)
    ... translations online via its integration in the use-case platforms. TraMOOC translation includes all types of text genre included in MOOCs: assignments, tests, presentations, lecture subtitles, forum text, from English into eleven languages, i.e. German, Italian, Portuguese, Greek, Dutch, Czech, Bulgarian ...

  • Pre-failure deformation monitoring as rockfall prediction tool

    Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić (2021)
    General Engineering
    ... [10] as source areas, wherein the rockfall trajectories were simulated for various settings. The rock strata were also sampled for laboratory tests (unofficial data: UCS 80-100 MPa, Tensile strength 30-40 MPa, Bulk density 25 kN/m3), some fresh surfaces were scanned from close-range for ...

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia

    Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić (2019)
    Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology
    ... re or only in generic level. The taxonomic diversity of radiolarian assemblages is low due to selective and poor preservation. Radiola- rian tests are commonly recrystallized. Anyway, ob- tained results allow us to date limestone deposits of Grivska Formation. According to the presence of ...

  • Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif

    Ljiljana Vasić, Laszlo Palcsu, Huang Fen (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry

  • A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić (2012)
    This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...
    multilingual digital libraries, query expansion, TMX
    ... published in the journal INFOtecha. Although the tool is still under development, and hence not fully operational, the results of the initial tests were very encouraging. In the nearest future the interface of the tool will be further enhanced, and its functionalities improved, taking especially ...

  • Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta

    Vesna Cvetkov (2020)
    ... Lynch, D., De Vore, S., Adamek, S., Martin,T., Holley, G., Michlo- vic, M. 2001. The Measurement and Analysis of Depth in Archaeological Geophysics: Tests at the Biesterfeldt Site, USA. Archaeological Prospection 18, 4: 245-265. Desvignes. G., Tabbagh, A., Bene- ch. C. 1999. The determination of the ...

  • Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić (2024)
    The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...
    optimizacija, 3D model, bušenje, miniranje, O-Pitblast, softver

  • Geofizičko reflektivno sondiranje kao test integriteta betonskog šipa

    Jovo Jakišić (2024)
    Temelj predstavlja izuzetno bitan element svakog građevinskog objekta. Zbog toga je neophodno poštovati odgovarajuće standarde, u projektovanju i izvođenju temeljne konstrukcije.Šipovi predstavljaju jedan od načina dubokog fundiranja tj. temeljenja. Za svaki izvedeni šip pojedinačno neophodno je izvesti kontrolu kvaliteta. Postoji više postupaka kojima je mogućeizvršiti kontrolu kvaliteta, a jedan od njih je test integriteta šipa malom silom, koji je prikazan u ovom radu.Ovaj postupak se izvodi seizmometrijskom metodom, postupkom refleksije, koji je definisan međunarodnim standardom ASTM D5882.Podaci koji su prikazani ...
    temelj, šip, seizmometrijska metoda
    ... ASTM Standard su: - C 469 Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression - D1I98 Methods of Static Tests of Timbers in Structural Sizes - D653 Terminology Relating to Soil, Rock, and Contained Fluids - D1II143 Method of Testing Piles Under Static Axial ...

  • 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

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... face-to-face class activities in their teaching, an in-house tool was developed to provide online publishing of educational materials, organization of tests and e-communication with students. Later on, blended approach at FMG was further enhanced by introducing Moodle (Modular Object-Oriented Dynamic ...

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Frequency and Length of Syllables in Serbian

    Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)
    Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.
    frekvencije slogova, dužina slogova, srpski jezik
    ... not marginal are allowed to form syllable onsets and codas. If one follows his modification, a large enough corpus is needed to perform statistical tests, based on which a decision on the (non-) marginality of a particular consonant cluster is made. Finding or creating such a corpus can be problematic ...
    ... Boston: Brill. Clements, G.N. (1990). The role of the sonority cycle in core syllabification. In: Kingston, J., Beckman, M.E. (eds.), Papers in Laboratory Phonology I: Between the Grammar and the Physics of Speech: 283-333. Cambridge: Cambridge University Press. Comrie, B. (1996). Adaptations of ...