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    Wyświetlanie 1-4 z 4
    Tytuł:
    Thermobaric Effects of Cast Composite Explosives of Different Charge Masses and Dimensions
    Autorzy:
    Simić, D.
    Knežević, D.
    Savić, K.
    Draganić, V.
    Sirovatka, R.
    Tomić, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358429.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    shock wave in air
    maximum overpressure
    pressure impulse
    thermal effect
    infrared camera
    thermal imaging
    Opis:
    The aim of this research was to determine the thermobaric effect of cast composite explosives, with different masses and dimensions of the chosen explosive charges. This was done by measuring the shock wave parameters in air (maximum overpressure and pressure impulse) and quantifying the thermal effect (temperature-time dependence), at different distances from the centre of the detonation. The chosen thermobaric explosive composition, TBE-3, was characterized. Its density, detonation velocity and viscosity-time dependence were determined. Experimental samples of different masses and calibres were prepared. The shock wave parameters in air were determined in field tests, by measuring the overpressure by piezo-electric pressure transducers. The detonation and the expansion of the explosion products were filmed by a TV high-speed camera, Phantom V9. An infrared (IR) camera FLIR SC7200 was used for recording the IR scene of the explosions and for tracking the thermal effects by a thermographic technique, i.e. thermal imaging. This work is an initial step towards establishing a method for the quantification of the thermal effects of a thermobaric detonation.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 1; 161-182
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organic geochemical study of the Lower Miocene Kremna Basin, Serbia
    Autorzy:
    Perunović, T.
    Stojanović, K.
    Simić, V.
    Kašanin-Grubin, M.
    Šajnović, A.
    Erić, V.
    Schwarzbauer, J.
    Vasić, N.
    Jovančićević, B.
    Brčeski, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/191854.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Kremna Basin
    lacustrine sediments
    organic matter
    mineralogy
    biomarkers
    pyrolysis
    Opis:
    The Kremna Basin is located in southwest Serbia, in the Zlatibor area, which is part of the Internal Dinarides. This basin is noteworthy because of the type of bedrock drainage, which it represents. It was formed on ultrabasic rocks and volcanic materials that influenced the occurrence of organic matter (OM) in the basin fill. The objective of the study was to determine the organic geochemical characteristics of sediments from the central part of the Kremna Basin. The sediments studied belong to an intrabasinal facies, in which two sequences were distinguished. The lower sequence occurs at depths of 216–343 m, while the upper sequence is found from 13.5–216 m. At the start of basin development (265–343 m) sedimentation took place in shallow alkaline water, rich in Mg ions. Through time, a slight deepening of the basin occurred. This was followed by chemical deposition of carbonates (216–265 m). The most important change in the sedimentary environment occurred with the formation of sediments marking the transition between the sequences (at about 200 m). Sediments from the lower sequence are characterized by the dominance of dolomite and magnesite. There are indications of volcanic activity, i.e. tuff layers and the presence of searlesite. The upper sequence is characterized by the prevalence of calcite and dolomite. The amounts of MgO, Na2O and B are higher in the lower sequence, whereas the CaO content is higher in the upper sequence. The sediments contain different amounts of immature OM (late diagenesis). Biomarker analysis shows diverse precursors of the sedimentary OM: methanogenic archaea, photosynthetic green sulfur bacteria (Chlorobiaceae), bacterivorous ciliates, various bacteria, both photosynthetic and non-photosynthetic, the green unicellular microalga, Botryococcus braunii race A (exclusively in the upper sequence) and terrestrial plants. The lower sequence contains lower amount OM, composed primarily of kerogen II/III and III types, indicating a higher contribution of the allochtonous biomass of land plants from the lake catchment, particularly in the lower part. The sediments of the upper sequence are enriched in autochthonous aquatic OM, which comprises mostly kerogen I, I/II and II types. The transition from the lower sequence to the upper one is associated with a decrease in pristane to phytane ratio, gammacerane index and content of C28 steroids, absence or significantly lower amount of squalane, absence of C24 and C25 regular isoprenoids, 8-methyl-2-methyl-2-(4,8,12-trimethyltridecyl) chroman and C30 hop-17(21)-ene. Pyrolytic experiments showed that the sediments of the upper sequence, rich in aquatic OM, at a catagenetic stage could be a source of liquid hydrocarbons. The values of hopane, sterane and phenanthrene maturation parameters indicate that through pyrolysis at 400°C the samples investigated reached a value of vitrinite reflectance equivalent of approximately 0.70%. It was estimated that the sediments should be found at depths of 2300–2900 m in order to become active source rocks. The calculated minimum temperature, necessary for catagenetic hydrocarbon generation, is between 103 and 107°C.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2014, 84, 3; 185-212
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Land Sensitivity Analysis of Degradation using MEDALUS model : Case Study of Deliblato Sands, Serbia
    Autorzy:
    Kadović, R.
    Bohajar, Y. A. M.
    Perović, V.
    Simić, S. B.
    Todosijević, M.
    Tošić, S.
    Anđelić, M.
    Mlađan, D.
    Dovezenski, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/204632.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Deliblato sands
    land degradation
    sensitivity
    MEDALUS
    GIS mapping
    Opis:
    This paper studies the assessment of sensitivity to land degradation of Deliblato sands (the northern part of Serbia), as a special nature reserve. Sandy soils of Deliblato sands are highly sensitive to degradation (given their fragility), while the system of land use is regulated according to the law, consisting of three zones under protection. Based on the MEDALUS approach and the characteristics of the study area, four main factors were considered for evaluation: soil, climate, vegetation and management. Several indicators affecting the quality of each factor were identified. Each indicator was quantified according to its quality and given a weighting of between 1.0 and 2.0. ArcGIS 9 was utilized to analyze and prepare the layers of quality maps, using the geometric mean to integrate the individual indicator map. In turn, the geometric mean of all four quality indices was used to generate sensitivity of land degradation status map. Results showed that 56.26% of the area is classified as critical; 43.18% as fragile; 0.55% as potentially affected and 0.01% as not affected by degradation. The values of vegetation quality index, expressed as coverage, diversity of vegetation functions and management policy during the protection regime are clearly represented through correlation coefficient (0.87 and 0.47).
    Źródło:
    Archives of Environmental Protection; 2016, 42, 4; 114-124
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lean RFID approach enhancing the information and material flows in emergency department
    Autorzy:
    Ilin, V.
    Simić, D.
    Simić, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/333634.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    ochrona zdrowia
    doskonalenie procesów
    healthcare
    Emergency Departament
    process improvement
    lean RFID approach
    Opis:
    Modern technologies and technics nowadays play a very important role in optimizing many processes. Healthcare sector is a vital system of every country and it requires great investment and constant improvement, which makes integration with modern technologies and technics inevitable. Efficiency, speed and time savings are thus crucial for achievement of this integration. Lean RFID approach is completely new way of modeling and optimizing healthcare systems. The objective of this paper is to identify, describe and analyze recent trends in merging healthcare (Emergency Department) and Lean and RFID principles into a unique system. Obtained results indicate that the application of certain segments of Lean "thinking" significantly increases the efficiency of focused processes in healthcare. The main idea of the integration of medicine and Lean RFID approach is to constantly create and improve new values and reject all the activities that are categorized as "waste" in order to provide time savings, which are extremely important in this branch.
    Źródło:
    Journal of Medical Informatics & Technologies; 2012, 21; 49-55
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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