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Wyszukujesz frazę "Milosavljevic, A." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Fine-Scale Structure Investigation of Nimonic 263 Superalloy Surface Damaged by Femtosecond Laser Beam
    Autorzy:
    Milosavljevic, A.
    Petronic, S.
    Sreckovic, M.
    Kovacevic, A.
    Krmpot, A.
    Kovacevic, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791236.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    01.55.+b
    42.62.-b
    81.05.Bx
    81.20.Vj
    Opis:
    Due to the specific conditions of manufacturing, processing and utilization of nickel-base superalloys, the implementation of contemporary precision techniques is necessary in the research of the alloys features. Multi-component nickel-base superalloys, with about of 50% of nickel content, are commonly exploited in the conditions of high temperatures and pressures as well as in various aggressive operating environments. For successful quality control, which includes the monitoring of the changes in the alloy microstructure, fine-scale structure investigations are necessary. In this work, the samples of nickel-base superalloys have been exposed to 800 nm femtosecond laser in various operating regimes. Surface damages and dents caused by femtosecond laser pulses have been observed by optical and scanning microscopy.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 553-556
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure Changes of Nickel-Base Superalloys Induced by Interaction with Femtosecond Laser Beam
    Autorzy:
    Petronic, S.
    Drecun-Nesic, S.
    Milosavljevic, A.
    Sedmak, A.
    Popovic, M.
    Kovacevic, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791235.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    01.55.+b
    42.62.-b
    81.05.Bx
    Opis:
    The investigation was performed on nickel-base superalloys, with nickel being the most influential alloying ingredient. After thermo-mechanical preparation and corresponding processing, femtosecond laser beam machining has been performed. The laser wavelength was 800 nm. The exposition time, during which the samples have been exposed to the pulses of femtosecond laser beam varied, as well as the average output power. The changes of both the output power and the exposition time enabled the samples to be irradiated with different total energy during each exposition. The changes in samples microstructure were observed with optical and scanning electron microscopy, with energy-dispersive spectrometry, and analyzed as well. Microhardness measurements of both base material and ablated spots have been performed.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 550-552
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ruby Laser Interaction with Austenite Structural Materials
    Autorzy:
    Milosavljević, A.
    Petronić, S.
    Srećković, M.
    Ristić, S.
    Nešić, I.
    Pljakić, R.
    Negovanović, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808064.pdf
    Data publikacji:
    2009-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    01.55.+b
    42.62.-b
    81.05.-t
    Opis:
    The investigations were carried out on chrome nickel steel and nickel based superalloy samples thermo-mechanically treated to obtain optimal mechanical properties and surface stability. Chrome nickel steel and a few nickel based superalloys samples were exposed to the laser beam before creep deformation process. The second group of nickel based superalloy samples were exposed after the creep deformation. The damages occurred by exposing of chrome nickel steel and nickel base superalloy samples to the ruby laser were analyzed by scanning electron microscope and energy-dispersive X-ray spectrometry. In this paper, the influence of laser dynamical regime (MW/$mm^{2}$) to the microstructural changes of heat treated chrome nickel steel and nickel based superalloy are analyzed and discussed.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 4; 823-825
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical and Electron Spectrometry of Molecules of Biological Interest
    Autorzy:
    Marinković, B. P.
    Milosavljević, A. R.
    Maljković, J. B.
    Šević, D.
    Petruševski, B. A.
    Pavlović, D.
    Filipović, D. M.
    Terzić, M.
    Pejčev, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047901.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    34.80.Gs
    34.80.Bm
    52.25.Os
    Opis:
    Optical absorption and emission spectroscopy together with low energy electron interaction (elastic scattering, excitation, ionization, resonances) with biologically relevant molecules (nitrogen, oxygen, water, alcohols, tetrahydrofuran, tetrahydrofurfuril alcohol, 3-hydroxytetrahydrofuran, pyrimidine, glycine, alanine) are studied in order to understand radiation damage and to investigate the presence of pollutants in the atmosphere. Versatile high resolution electron spectrometers are used in the present study of electron-molecule interactions. Energy loss spectra were recorded for these molecules in order to identify electronic transitions from ground state to both allowed and optically forbidden states. Optical emission spectra have been recorded from gas discharge processes by low resolution optical spectrometer (Ocean Optics 2000). Also, electronic spectra were compared with high resolution synchrotron photoabsorption spectra where these spectra had been available. Experimental methods of absorption-based laser spectroscopy were reviewed being of the most widely used analytical tools for detection of a specific molecule and quantitative measurements, based on the Beer-Lambert absorption law.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 1145-1150
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Framework for the Evaluation of the Feasibility of Public – Private Partnership in Local Government in Serbia
    Autorzy:
    Benkovic, Sladjana
    Milanovic, Nemanja
    Milosavljevic, Milos
    Powiązania:
    https://bibliotekanauki.pl/articles/475057.pdf
    Data publikacji:
    2017
    Wydawca:
    Fundacja Upowszechniająca Wiedzę i Naukę Cognitione
    Tematy:
    public-private partnership
    local government financing
    Serbia
    Opis:
    The adoption of the New Law for Local Government Financing is currently underway in a Serbian Parliament procedure. The goal of the new law is the creation of clear government regulations which will define the system of financing for local government entities. This will furthermore create an environment of stability and predictability with regard to revenue planning when preparing local government entities’ budgets, as well as achieving a vertical balance when distributing revenues amongst various state levels. Additionally, these goals are reflected in the establishment of a system to increase the share of public investment in the total expenses of counties and cities, as well as in the vertical balance with regard to the distribution of revenue and jurisdiction at various state levels. In that sense, it is preferable to understand financial models such as public-private partnerships, which have still not, to an adequate degree, been adopted in Serbia, but one which could potentially contribute to the introduction of additional sources of local government financing. In order to better perceive the current capacities of this model of financing local government in Serbia, a study was conducted during the spring and summer of 2016, taking into account a sample of 150 examinees. The results of the study indicate very low human resource and technical capacities in local government with regard to realizing and comprehending the concept of public-private partnership.
    Źródło:
    Journal of Entrepreneurship, Management and Innovation; 2017, 13, 4; 7-23
    2299-7075
    2299-7326
    Pojawia się w:
    Journal of Entrepreneurship, Management and Innovation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Refunctionalisation of Form. The Modernist Turn in the Opus of Painter Leonid Šejka
    Refunkcionalizacija forme. Modernistički obrt u opusu slikara Leonida Šejke
    Autorzy:
    Milosavljević-Ault, Angelina
    Powiązania:
    https://bibliotekanauki.pl/articles/635756.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Leonid Šejka
    form
    function
    modernism
    objecthood
    Opis:
    Works by Belgrade artist Leonid Šejka (1932–1970) are usually considered fantastic, an embodiment of aesthetic ideals of Mediala Art Group he was a member of, an opposition to everything that Modernism stood for with its harsh formalism that expelled object. However, the complexity of Šejka’s opus as artist and theorist allows a different approach. In this paper, we turn to – so far neglected – Šejka‘s positive relation to Modernism, which he saw as a foundation for new aesthetic ideals. He understood that Modernism turned paintings into objects of empty forms void of function. Nevertheless, the future of painting, for him, resided in re-introduction of objects into painting in order to re-establish the necessary form-function relation, preserving, at the same time, Modernist traits. Šejka tried to demonstrate this in his mature works. He wrote about it in a series of writings, which contribute to our understanding of his opus.
    Źródło:
    Poznańskie Studia Slawistyczne; 2017, 13
    2084-3011
    Pojawia się w:
    Poznańskie Studia Slawistyczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Examination of Shoulder Postures and Moments of Force Among Different Skill Levels in the Wool Harvesting Industry
    Autorzy:
    Gregory, D. E.
    Pal, P.
    Carman, A.
    Milosavljevic, S.
    Callaghan, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90088.pdf
    Data publikacji:
    2009
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    performance
    ergonomics
    sheep shearing
    biomechanics
    shoulder
    skill
    posture
    Opis:
    The wool harvesting industry employs workers of varying skill levels that differ in both quality and number of harvested fleeces. As it was unknown how skill affected parameters such as joint posture and loading, the current study comparatively examined 140 wool harvesting workers representing 4 skill levels during wool harvesting competitions. Three-dimensional upper limb postures and peak and cumulative shoulder moments were calculated for each worker. Results indicated that elite wool harvesters, in general, used different shoulder postures to perform the harvesting tasks and were thus exposed to different shoulder moments as compared to the lower skill levels. It is plausible that these adopted postures allow the higher class workers to perform their job with higher quality and greater speed as compared to the lower ranked workers. Postural-based training may help improve technique in lower ranked workers and enable these workers to achieve higher ranked status.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2009, 15, 4; 409-418
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electric and magnetic properties of nickel and nickel-plladium nanowires deposited in anodic aluminum oxide template
    Autorzy:
    Bayev, V.
    Fedotova, J.
    Maximenko, A.
    Streltsov, E.
    Malashchonak, M.
    Azarko, I.
    Fedotov, A.
    Svito, I.
    Patryn, A.
    Apel, P.
    Tyutyunnikov, S.
    Milosavljević, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/118462.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    template-assisted electrodeposition
    magnetic anisotropy
    magnetoresistance
    porous alumina templates
    anizotropia magnetyczna
    elektroosadzanie
    magnetoopór glinu
    Opis:
    Structure, electric and magnetic properties of ordered Ni and Ni-Pd nanostructures synthesized by means of electrochemical deposition in porous anodic aluminum oxide templates were investigated. Templates were filled with nickel and nickel-palladium compositions using the alternative current. Matrix parameters (pores diameter and depth) determine the sizes and morphology of the formed metal nanowires. Negative sign of magnetoresistance was observed at T < 50 K and attributed to TMR effect due to variable range hopping carrier transport mechanism. Positive magnitoresistance was observed at T > 100 K and explained by Lorence-like mechanism. The presence of magnetic perpendicular anisotropy towards template plane in synthesized nanostructures was revealed. Demagnetizing factors of individual nanowire in parallel and perpendicular direction towards template plane were determined by magnetic resonance spectroscopy. Revealed increase of coercivity in nanowires containing palladium was explained by the formation of quasi- multilayered structure of Ni/Pd nanowires during the ac electrochemical deposition.
    Struktura, właściwości elektryczne i magnetyczne uporządkowanych Ni Ni-Pd nanostruktur syntezowanych metodą elektrochemicznego nanoszenia w porowatej matryce z utlenionego aluminiowego anodu. Matryca została wypełniona Ni lub Ni-Pd mieszanką z wykorzystaniem prądu zmiennego. Parametry matrycy (średnica i głębokość pór) wpływały na rozmiary i morfologię tworzących się metalicznych nanodrutów. Ujemna magnetorezystancja była obserwowana w temperaturze T<50K i mogła być opisana w ramkach mechanizmu skokowej przewodności. Pozytywna magnetorezystancja została obserwowana dla T>100K i odpowiada mechanizmowi typu Lorence. Obecność magnetycznej prostopadłej anizotropii w stosunku do płaszczyzny matrycy była zanotowana. Demagnezujący czynnik pojedynczych nanodrutów w kierunkach równoległych i prostopadłych do płaszczyzny matrycy był wyznaczony z badań metodą magnetycznej spektroskopii rezonansowej. Zaobserwowany wzrost komercyjności w nanodrutach zawierających palladium może być związany z formowaniem kwasi-wielowarstwowej struktury w Ni/Pd nanodrutach w trakcie elektrochemicznego osadzenia.
    Źródło:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej; 2012, 4; 43-54
    1897-7421
    Pojawia się w:
    Zeszyty Naukowe Wydziału Elektroniki i Informatyki Politechniki Koszalińskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Few Examples and Counterexamples in Spectral Graph Theory
    Autorzy:
    Stevanović, Dragan
    Milosavljević, Nikola
    Vukičević, Damir
    Powiązania:
    https://bibliotekanauki.pl/articles/31563587.pdf
    Data publikacji:
    2020-05-01
    Wydawca:
    Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
    Tematy:
    communicability distance
    spectral radius
    integral graph
    second Zagreb index
    Wiener index
    estrada index
    almost cospectral graphs
    NEPS of graphs
    Opis:
    We present a small collection of examples and counterexamples for selected problems, mostly in spectral graph theory, that have occupied our minds over a number of years without being completely resolved.
    Źródło:
    Discussiones Mathematicae Graph Theory; 2020, 40, 2; 637-662
    2083-5892
    Pojawia się w:
    Discussiones Mathematicae Graph Theory
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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