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    Wyświetlanie 1-11 z 11
    Tytuł:
    Wielokryterialna ocena zastosowania pasmowych kompresorów dynamiki do usuwania defektów nagrań
    Multicriteria evaluation of the use of multiband dynamic compressors in audio recording defects elimination
    Autorzy:
    Jakowska-Suwalska, K.
    Suwalski, P.
    Wolny, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/324959.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    wielowymiarowa analiza porównawcza
    wielokryterialna ocena
    porządkowanie obiektów
    pasmowe kompresory dynamiki
    comparative multidimensional analysis
    multicriteria evaluation
    ordering of object
    multiband dynamic compressor
    Opis:
    W pracy przedstawiono wielokryterialną ocenę czterech kompresorów dynamiki zastosowanych do usuwania defektów nagrań. Przyjęto pięć kryteriów oceny kompresorów. Ocenę kompresorów przeprowadzili eksperci (producenci nagrań i reżyserzy dźwięku). Po ocenie zgodności opinii ekspertów zbudowano ranking użyteczności kompresorów.
    This paper presents a multicriteria evaluation of four dynamic compressors used to audio recording's defects elimination. Five evaluation criteria has been chosen. The evaluation has been made by experts (music producers and sound engineers) in Likert scale from 0 to 5. After evaluation ofconformity of experts', a ranking of usability of compressor has been made.
    Źródło:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2016, 96; 451-461
    1641-3466
    Pojawia się w:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A hybrid (hydro-numerical) circulatory model: investigations of mechanical aortic valves and a numerical valve model
    Autorzy:
    Kozarski, M.
    Suwalski, P.
    Zieliński, K.
    Górczyńska, K.
    Szafron, B.
    Pałko, K. J.
    Smoczyński, R.
    Darowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/202199.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biological and mechanical heart valves
    numerical heart valve
    hybrid (hydro-numerical) circulatory model
    voltage-controlled hydraulic pressure (flow) source
    hydraulic input impedance
    varying-elastance left ventricle
    Opis:
    In most cases of diseased heart valves, they can be repaired or replaced with biological or mechanical prostheses. Biological prostheses seem to be safer than mechanical ones and are applied with good clinical outcomes. Their disadvantage, when compared with mechanical valves, is durability. In the development and application of mechanical and biological heart valves, a significant role can be played by a Hybrid (Hydro-Numerical) Circulatory Model. The aim of this paper is to demonstrate the opportunities created by the hybrid model for investigations of mechanical heart valves and their computer models under conditions similar to those of the circulatory system. A diode-resistor numerical valve model and three different design mechanical aortic valves were tested. To perform their investigations, computer applications were developed under RT LabView to be run on a PC. Static and dynamic characteristics of the valves were measured and registered - pressure in the numerical time-varying elastance left ventricle (pLV), in the aorta (pas) and flow (f), proving, among other factors, that 1) time delay of pas with respect to pLV is mainly related to the valve’s opening time, and 2) the valves of substantially different designs tested under identical hydrodynamic conditions reveal nearly the same dynamic performance.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 3; 605-612
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Mössbauer effect studies of Dy(Fe0.4Co0.6-x Alx)2 intermetallics
    Autorzy:
    Stoch, P.
    Pszczoła, J.
    Suwalski, J.
    Pańta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/148809.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    crystal structure
    hyperfine interactions
    Mössbauer spectroscopy
    rare earth
    Slater-Pauling curve
    transition
    Opis:
    The magnetic hyperfine fields observed at the 57Fe nuclei (77 K) in the Dy(Mn1-xFex)2 and Dy(Fe1-xCox)2 intermetallics form a Slater-Pauling curve. In order to study the effect of cobalt atoms on crystal structure and hyperfine interactions, the new Co/Al substituted series Dy(Fe0.4Co0.6-xAlx)2 was prepared and data of X-ray powder analysis are presented (300 K). From the 57Fe Mössbauer measurements at 77 K the hyperfine parameters were obtained. The magnetic hyperfine fields form a branch of the Slater-Pauling curve.
    Źródło:
    Nukleonika; 2003, 48,suppl.1; 75-77
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer spectroscopy study of 60P2O5-40Fe2O3 glass
    Autorzy:
    Stoch, P.
    Ciecińska, M.
    Zachariasz, P.
    Suwalski, J.
    Górski, L.
    Wójcik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/147350.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    iron phosphate glass
    Mössbauer spectroscopy
    nuclear waste
    waste glass
    Opis:
    A 57Fe Mössbauer spectroscopy study is presented. The main goal of the research was to investigate the structural information of the glass-like the coordination numbers and redox ratio of the iron. Most of the iron, about 80%, is present in the glass as Fe3+, which is composed of tetrahedral (57%) and octahedral (23%) coordinated iron. The rest of the iron, about 20%, is in the oxidation state Fe2+. This iron could be mostly present as VIFe2+, but five-fold coordinated iron is also possible. Finally, the structural model of the synthesized 60P2O5-40Fe2O3 glass was proposed.
    Źródło:
    Nukleonika; 2013, 58, 1; 63-66
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperfine interactions in Ho(Fe1-xCox)2 compounds at 295 K
    Autorzy:
    Bednarski, M.
    Stoch, P.
    Bodnar, W.
    Zachariasz, P.
    Pszczoła, J.
    Suwalski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148624.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    intermetallics
    crystal structure
    Laves phase
    Mössbauer effect
    hyperfine interaction
    Slater-Pauling dependence
    Opis:
    Synthesis of Ho(Fe1–xCox)2 intermetallic compounds, studies of their crystal structure and 57Fe Mössbauer effect analysis were carried out at 295 K. X-ray measurements evidence a pure cubic Fd3m, C15, MgCu2-type Laves phase. The unit cell parameter decreases non-linearly with composition parameter x. Mössbauer effect spectra for the Ho(Fe1–xCox)2 series were composed of a number of locally originated subspectra due to random Fe/Co nearest neighbourhoods. Hyperfine interaction parameters, i.e. isomer shift, the magnetic hyperfine field and a quadrupole interaction parameter were determined from the fitting procedure of the spectra, for both the individual nearest neighbourhoods, and for the sample as bulk. As a consequence of Fe/Co substitution a Slater-Pauling type curve for the average magnetic hyperfine field vs. x is observed. The correlation between the local magnetic hyperfine fields and the average magnetic hyperfine fields is related to weak and strong ferromagnetism of the transition metal sublattice.
    Źródło:
    Nukleonika; 2010, 55, 3; 279-284
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer effect studies of Dy(Fe0.7-xNixCo0.3)2 intermetallics
    Autorzy:
    Jabłońska, A.
    Suwalski, J.
    Pszczoła, J.
    Guzdek, P.
    Stoch, P.
    Pańta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147231.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    intermetallics
    crystal structure
    57Fe Mössbauer effect
    hyperfine interactions
    Slater-Pauling curve
    band structure
    Opis:
    Abstract A consequence of the Fe/Ni substitution in the series of Dy(Fe0.7 xNixCo0.3)2 was studied in the presented paper. The synthesis and X-ray analysis (300 K) of the Dy(Fe0.7 xNixCo0.3)2 system were performed. The cubic, MgCu2-type, Fd3m crystal structure was evidenced for this solid solution. 57Fe Mössbauer effect measurements for the system were carried out at 77 K. The obtained crystallographic lattice parameters and the hyperfine interaction data are presented. The magnetic hyperfine field values form a separate branch of the Slater-Pauling curve situated above the branch corresponding to the Dy(Fe1 xCox)2 intermetallics.
    Źródło:
    Nukleonika; 2004, 49,suppl.3; 85-88
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperfine interactions in Tb0.27-xYxDy0.73Fe2 compounds at 295 K
    Autorzy:
    Krawczyk, A.
    Zwoźniak, A.
    Guzdek, P.
    Stoch, P.
    Zachariasz, P.
    Suwalski, J.
    Pszczoła, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147818.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    hyperfine interaction
    intermetallics
    Laves phase
    Mössbauer effect
    Opis:
    This paper concerns the synthesis of yttrium-dilute Tb0.27-xYxDy0.73Fe2 intermetallic series with a borderline compound Tb0.27Dy0.73Fe2 known as Terfenol-D by arc melting, XRD analysis and 57Fe Mössbauer effect studies at 295 K. XRD analysis (295 K) shows that all samples crystallize in a cubic, Fd3m, MgCu2-type structure. The lattice parameter increases along with yttrium content. Mössbauer effect spectra for the Tb0.27-xYxDy0.73Fe2 series collected at 295 K consist of two subspectra due to easy direction of magnetization <111>. Hyperfine interaction parameters: isomer shift, magnetic hyperfine field and a quadrupole splitting were obtained from the fitting procedure of the spectra.
    Źródło:
    Nukleonika; 2013, 58, 1; 133-135
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperfine interactions in Dy(Co0.4-xNixFe0.6)2 compounds at 295 K
    Autorzy:
    Zwoźniak, A.
    Krawczyk, A.
    Stoch, P.
    Guzdek, P.
    Zachariasz, P.
    Suwalski, J.
    Pszczoła, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148005.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    hyperfine interaction
    intermetallics
    Mössbauer effect
    Slater-Pauling dependence
    Opis:
    57Fe Mössbauer effect studies were performed for the cubic C15, Fd3m, MgCu2-type Dy(Co0.4-xNixFe0.6)2 intermetallics. Hyperfine interaction parameters : isomer shift, magnetic hyperfine field and quadrupole interaction parameter were obtained from the fitting procedure of the collected 57Fe Mössbauer effect spectra. As a result of Co/Ni substitution, a Slater-Pauling type curve for the average magnetic hyperfine field vs. Ni content in the Dy(Co0.4-xNixFe0.6)2 series is observed.
    Źródło:
    Nukleonika; 2013, 58, 1; 179-181
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer effect studies of Dy(Fe0.4-xNixCo0.6)2
    Autorzy:
    Jabłońska, A.
    Suwalski, J.
    Stoch, P.
    Pszczoła, J.
    Guzdek, P.
    Szamański, P.
    Pańta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/148209.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    crystal structure
    Mössbauer effect
    hyperfine interaction
    Slater-Pauling curve
    band structure
    Opis:
    A consequence of the Fe/Ni substitution in the Dy(Fe0.4Co0.6)2 compound was studied in the present paper. For this purpose the synthesis and X-ray analysis (295 K) of the Dy(Fe0.4 xNixCo0.6)2 series were performed. The cubic, MgCu2-type, Fd3m crystal structure was observed across the series. 57Fe Mössbauer effect spectra for the series were collected at 77 K. The obtained crystallographic data and the hyperfine interaction parameters are presented. The magnetic hyperfine fields form a separate branch of the Slater-Pauling curve known for the Dy(Mn1 xFex)2 and Dy(Fe1 xCox)2 series. The data are qualitatively related to the Stoner model.
    Źródło:
    Nukleonika; 2007, 52, supl. 1; 55-58
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hyperfine interactions in Tb0.27Dy0.73(Fe1–xCox)2 compounds at 77 K
    Autorzy:
    Bodnar, W.
    Szklarska-Łukasik, M.
    Stoch, P.
    Zachariasz, P.
    Pszczoła, J.
    Suwalski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148142.pdf
    Data publikacji:
    2009
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    intermetallics
    crystal structure
    Laves phase
    Mössbauer effect
    hyperfine interaction
    Slater-Pauling dependence
    Opis:
    The synthesis of materials, crystal structure and 57Fe Mössbauer effect studies at 77 K were performed for intermetallics Tb0.27Dy0.73(Fe1–xCox)2. The starting compound Tb0.27Dy0.73Fe2 of this Fe/Co substituted series is known as Terfenol-D. XRD measurements evidence a pure cubic Laves phase C15, MgCu2-type. The determined unit cell parameter decreases across the series. Co substitution introduces a local area, in the subnanoscale, with random Fe/Co neighbourhoods of the 57Fe atoms. Mössbauer effect spectra for the Tb0.27Dy0.73(Fe1–xCox)2 series collected at 77 K consist of a number of locally originated subspectra due to random composition of Fe and Co atoms in the nearest neighbourhood. Hyperfine interaction parameters: isomer shift, magnetic hyperfine field and a quadrupole interaction parameter were obtained from the fitting procedure of the spectra, both for the local area and for the sample as bulk. As a result of Fe/Co substitution, a Slater-Pauling type curve for the average magnetic hyperfine field vs. Co content in the Tb0.27Dy0.73(Fe1–xCox)2 series is observed. It is found that the magnetic hyperfine fields corresponding to the local area sorted out against Co contribution in the Fe/Co neighbourhoods also create a dependence similar to the Slater-Pauling type curve.
    Źródło:
    Nukleonika; 2009, 54, 4; 227-232
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer effect studies of Dy(Mn0.4-xAlxFe0.6)2 intermetallics
    Autorzy:
    Stoch, P.
    Pszczoła, J.
    Guzdek, P.
    Jabłońska, A.
    Suwalski, J.
    Dąbrowski, L.
    Pańta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147206.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    intermetallics
    crystal structure
    57Fe Mössbauer effect
    hyperfine interactions
    Slater-Pauling curve
    Opis:
    Both 3d subbands in the Dy(Mn0.4Fe0.6)2 compound are filled up only partially with 3d electrons. So, it was interesting to study the consequence of Mn/Al substitution in the Dy(Mn0.4 xAlxFe0.6)2 series. The cubic, MgCu2-type, Fd3m crystal structure was observed across the series. However, for x = 0.35 and 0.40 a stoichiometric admixture of the hexagonal, MgZn2-type, P63/mmc structure was evidenced. Mössbauer effect measurements at 57Fe nuclei were performed at 77 K. The magnetic hyperfine field decreases vs. the aluminium content x. This dependence is related to the possible 3d-electron band structure.
    Źródło:
    Nukleonika; 2004, 49,suppl.3; 23-25
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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