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Wyszukujesz frazę "Antal, J." wg kryterium: Autor

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    Wyświetlanie 1-10 z 10
    Tytuł:
    The impact of the soil additives application on the rainwater surface runoff
    Autorzy:
    Drgoňová, K.
    Novotná, B.
    Antal, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/124444.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    water erosion
    surface runoff
    soil additives
    rainfall simulator
    rainwater modelling
    Opis:
    The main aim of this work was the application of the soil additives into soil and the study of their impact on the amount of surface runoff originating from rainwater. Execution of research was carried out on the modified portion of the land at Department of Biometeorology and Hydrology, SUA Slovakia. Land was divided into four experimental plots. Individual treatments consisted of application of perlite, charcoal and water glass into the top layer of the experimental plots. The fourth experimental field was kept as a black fallow (control). To perform the measurements, rainfall simulator was used in six measurement series. We can conclude that the application of perlite is not an adequate treatment for erosion control practices, since its application increased the surface runoff. Increased application dose of additives resulted in the positive effects of the water glass application. Surface runoff for this treatment decreased in average by about 41% in comparison to control. This positive effect was observed only after the second application of the soil additives.
    Źródło:
    Journal of Ecological Engineering; 2016, 17, 5; 22-26
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of spark plasma sintering on microstructure and properties of bulk LaCaSrMnO magnetocaloric materials
    Autorzy:
    Zmorayová, K.
    Antal, V.
    Kováč, J.
    Diko, P.
    Noudem, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1053176.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Lx
    61.72.-y
    75.30.Kz
    77.80.B-
    81.70.Pg
    81.20.Ev
    81.30.Fb
    Opis:
    Polycrystalline La_{0.67}Ca_{0.33-x}Sr_xMnO₃ (x=0.33, 0.03, 0) (LCSM) perovskite samples treated by spark plasma sintering technique were investigated. This study proved influence of the sintering temperature on microstructure of these perovskite ceramics. The thermogravimetric measurements revealed the possibility of increase of oxygen content in studied LCSM samples by additional annealing under oxygen atmosphere and low temperature. Finally, the effect of this annealing on magnetic properties was demonstrated.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 804-806
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New optical equipment in 3D surface measuring
    Autorzy:
    Wenzel, K.
    Antal, A.
    Molnar, J.
    Tóth, B.
    Tamas, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/384327.pdf
    Data publikacji:
    2009
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    3D measuring
    Moiré method
    3D reconstruction of human body
    Opis:
    Referring to a Hungarian Government supported healthcare project "Intelligent tool and methodology to monitor and safeguard childhood spine deformities" (SPINE GUARD) the Department of Mechatronics, Optics and Information Engineering at Budapest University of Technology and Economics developed a new complex optical measuring equipment built up a projector and a digital camera. If the computer controlled projector projects an equidistant grid of lines then the camera takes a picture from a different position about the object to be measured and with a special software removing the grid lighted background there will be a virtual Moiré effect. After some picture processing the 3D (2,5D) reconstruction is finished. In an other working way the projector lights a rainbow on the object. The edges of the rainbow lines cut the crosssection of objects. An other special software reconstructs the 3D (2,5D) objects from the camera captured cross-section curves. Presentation is about the principle of measuring and evaluation of results and precision.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 29-31
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of Sm addition on the microstructure and superconducting properties of YBCO bulk superconductors
    Autorzy:
    Volochová, D.
    Diko, P.
    Piovarči, S.
    Antal, V.
    Kováč, J.
    Jirsa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1054772.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.72.-h
    74.62.Dh
    81.10.Fq
    61.72.-y
    74.25.Ha
    74.25.Sv
    Opis:
    The effect of Sm addition on the microstructure and superconducting properties of Y-Ba-Cu-O (YBCO) bulk superconductors has been studied. Nominal composition: 1 mol YBa₂Cu₃O_{7-δ} + 0.25 mol Y₂O₃ + 1 wt% CeO₂ was enriched with different amounts of SmBa₂Cu₃O_y powder with the aim to increase critical current density, J_c, especially in higher magnetic fields by introducing additional pinning centers. Single grain YBCO bulk superconductors with SmBa₂Cu₃O_y (Y123-Sm) addition were prepared by the optimized top seeded melt growth process. Microstructure analysis, performed by polarized light microscope, revealed that SmBa₂Cu₃O_y addition leads to a higher amount of slightly coarser Y₂BaCuO₅ particles, which is related to lower critical current densities (J_c ≈ 6×10⁴ A/cm²) of the YBCO samples with SmBa₂Cu₃O_y addition in low magnetic fields. On the other hand, an enhancement of critical current density, J_c, in higher magnetic fields was observed for Y123-Sm samples. Moreover, a maximum trapped magnetic field, B_{tmax}, of 564 mT at 77 K in Y123-Sm, x=0.0025 sample (Ø 17.2 mm) was 43% higher than that for YBCO sample without any addition.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1009-1011
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and Complex Characterization of Magnetic Nanoparticles in Magnetic Fluid
    Autorzy:
    Kubovčíková, M.
    Antal, I.
    Kováč, J.
    Závišová, V.
    Koneracká, M.
    Kopčanský, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1201928.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.Fk
    78.67.Bf
    36.40.Cg
    47.65.Cb
    75.50.Mm
    75.30.Cr
    Opis:
    This paper deals with the preparation and complex characterization of magnetite nanoparticles (MNPs), stabilized with sodium oleate (SO), by the routine methods such as infrared spectroscopy (FTIR), magnetic measurements, scanning electron microscopy (SEM) and dynamic light scattering (DLS). The FTIR spectra showed that SO molecules were linked to MNPs through chemical bonding. Magnetic measurements proved that the MNPs are superparamagnetic in nature. Four different methods were used to determine the size and size distribution of the MNPs: SEM, DLS, differential centrifugal sedimentation (DCS) and magnetic measurements. SEM analysis showed a relatively narrow size distribution of roughly spherical MNPs with a mean diameter of 61 nm. DLS analysis confirmed monodispersed MNPs production with hydrodynamic diameter of 75 nm. The size distribution determined by DCS was found to be 69 nm. Finally, the calculated magnetic core diameter obtained from magnetization curve was 10 nm. The obtained results demonstrate that SO coated MNPs fulfil the requirements for a useful drug delivery system.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 268-269
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Critical Current Density and Microstructure of $NdBa_2Cu_3O_7$ Single Crystal
    Autorzy:
    Diko, P.
    Zmorayová, K.
    Šefčiková, M.
    Antal, V.
    Kováč, J.
    Yao, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535339.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.25.Sv
    74.62.Bf
    Opis:
    The top-seeded solution growth method was used to grow NdBCOss single crystals in air. The microstructure of the samples has shown that the oxygenation crack structure developed in the single crystals. The intrinsic critical current density was estimated to be at least twice higher than the value of volume critical current density determined from the magnetization measurements.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 1028-1030
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and Magnetic Properties of La-Ca-Sr-Mn-O Perovskite Ceramics
    Autorzy:
    Zmorayova, K.
    Antal, V.
    Radusovska, M.
    Piovarci, S.
    Kováč, J.
    Kavecansky, V.
    Diko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1367705.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Sg
    75.47.Lx
    77.80.Bh
    81.20.Ev
    81.30.Fb
    Opis:
    $La_{0.67}Ca_{0.33-x}Sr_{x}MnO_{3}$ (x=0.33; 0.03; 0) (LCSM) perovskite magnetocaloric ceramics were prepared by solid state synthesis in air and sintering at 1520°. The phase composition was checked by x-ray powder diffraction. Microstructure analyses were done by scanning electron microscopy. The influence of high pressure oxygenation on magnetisation behaviour is shown.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 168-169
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time Dependent Changes in Ag Doped YBCO Superconductors
    Autorzy:
    Volochová, D.
    Antal, V.
    Diko, P.
    Šefčiková, M.
    Zmorayová, K.
    Kováč, J.
    Weber, H.
    Chaud, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535451.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.25.Sv
    74.62.Bf
    74.62.Dh
    74.62.Fj
    Opis:
    Magnetization measurements at 77 K were conducted on the single-crystalline samples of YBCO superconductor doped with Ag prepared by the top-seeded melt-growth process. The single-grain samples had a nominal composition $Y_{1.5}Ba_2(Cu,Ag)_3O_{y}$. Magnetization measurements on the samples, oxygenated by two different processes: by standard oxygenation and by high pressure oxygenation, repeated after 24 months, revealed time dependent changes in magnetization behaviour and critical transition temperatures, T_{c}, which could be associated with redistribution of oxygen vacancies and their interaction with Ag dopant atoms.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 1047-1048
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Sm and Yb Pollution on Superconducting Properties of YBCO Bulk Superconductors
    Autorzy:
    Volochová, D.
    Jurek, K.
    Radušovská, M.
    Piovarči, S.
    Antal, V.
    Kováč, J.
    Jirsa, M.
    Diko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1371573.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.60.Bf
    74.72.-h
    81.40.Rs
    74.25.Ha
    74.81.Bd
    74.25.Op
    Opis:
    $YBa_{2}Cu_{3}O_{7-δ }$ (YBCO, Y-123) bulk superconductors with a nominal composition $Y_{1.5}Ba_{2}Cu_{3}O_{x}$ and 1 wt% $CeO_{2}$ addition were prepared by the Top Seeded Melt Growth (TSMG) process. Small single-crystalline pieces, cut from the $SmBa_{2}Cu_{3}O_{y}$ (Sm-123) bulk, were used for seeding of epitaxial growth. Wavelength-dispersive spectrometry (WDS) confirmed the presence of 0.1 wt% Sm from the seed and 0.25 wt% Yb from the substrate, practically in the whole sample volume. The influence of this Sm and Yb contamination on superconducting properties of grown bulk materials is reported.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 358-359
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elimination of Magnetic Nanoparticles with Various Surface Modifications from the Bloodstream in vivo
    Autorzy:
    Tomasovicova, N.
    Khmara, I.
    Koneracka, M.
    Zavisova, V.
    Kubovcikova, M.
    Antal, I.
    Kovac, J.
    Muckova, M.
    Kopcansky, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032816.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    75.50.Tt
    87.85.jj
    Opis:
    The magnetic nanoparticles with the core diameter 10 nm stabilized by sodium oleate and bovine serum albumin in phosphate buffer have been modified by different biocompatible substances such as poly(ethylene glycol) (PEG), dextran (DEX), and polyvinylpyrrolidone (PVP). Prepared biocompatible magnetic fluids were characterized to obtain the particle size distribution using scanning electron microscopy and the dynamic light scattering method. To study the elimination of different modified magnetic nanoparticles from bloodstream, the biocompatible samples were applied intravenously to the mice bloodstream with further blood specimens collecting in given time intervals. Magnetic moment of the lyophilized blood samples was measured by SQUID magnetometer. Time dependence of magnetic moment of magnetic nanoparticles and magnetic nanoparticles modified by DEX, PEG and PVP normalized to the Fe₃O₄ showed that the circulation time of magnetic nanoparticles in the bloodstream depends on the substance used for modification. The unmodified magnetic nanoparticles were trapped by reticuloendothelial system within 1 h while magnetic nanoparticles modified by DEX, PEG and PVP circulated in blood up to 3 h.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1159-1161
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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