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Wyszukujesz frazę "Rudolf, R." wg kryterium: Autor

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Numerical Analysis of the Rapid Solidification Process of NiTi Binary Alloy
    Autorzy:
    Ternik, P.
    Zadravec, M.
    Svetec, M.
    Rudolf, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402311.pdf
    Data publikacji:
    2015-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    64.70.Ja
    81.30.Fb
    44.05.+e
    Opis:
    The objective of the present work is to analyse the solidification process of NiTi binary alloy. The physical medium is taken as an incompressible fluid where the heat is transferred by conduction and convection, including the thermal phase change phenomenon. The last one is modelled by the improvement procedure called enthalpy-porosity formulation, where the liquid-solid mushy zone is treated as a porous zone with porosity equal to the liquid fraction. The numerical model is based on the finite volume method in body fitted coordinates with a SIMPLER scheme to couple the pressure and velocity fields. The results are presented for the velocity and temperature field, as well as for the NiTi mass fraction during the solidification process.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 1; 43-47
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ellipsometric Measurements of Plastically Deformed Copper
    Autorzy:
    Mirić, M.
    Rudolf, R.
    Anžel, I.
    Hadžić, B.
    Romčević, M.
    Trajić, J.
    Romčević, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795714.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.-e
    78.40.Kc
    68.35.Ct
    Opis:
    Chemically pure copper (99.99) prepared in the sample of square cross-section (10×10 $mm^{2}$) and length about 50 mm was extremely plastically deformed with the repeated application of equal channel angular pressing. Equal channel angular pressing was applied as an effective technique for producing bulk nanoscaled structures. It is well known that severe plastic deformation of metallic materials often leads to microstructure with ultrafine grains and cross-sections which remain about equal before and after deformation. Optical properties of the sample were studied using spectroscopic ellipsometry in UV-VIS range. The parameters of the sample like copper oxide and surface roughness overlayer were calculated using two-film model together with the Bruggeman effective medium approximation.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 715-717
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimisation of osteosynthesis positioning in mandibular body fracture management using finite element analysis
    Autorzy:
    Daqiq, Omid
    Roossien, Charlotte C.
    Wubs, Friederik W.
    Bos, Rudolf R.M.
    van Minnen, Baucke
    Powiązania:
    https://bibliotekanauki.pl/articles/24987661.pdf
    Data publikacji:
    2023-06-26
    Wydawca:
    Gdański Uniwersytet Medyczny
    Tematy:
    Mandibular body fracture
    Finite element analysis (FEA)
    Polymeric model testing
    Mandibular body height
    Miniplate positioning
    Opis:
    Background: This proof of principle study aims to investigate the applicability of finite element analysis (FEA) in Oral and Maxillofacial (OMF) surgery, by studying the effect of mandibular body height and osteosynthesis positioning on unilateral mandibular body fractures based on Champy’s technique. Material and methods: Mandibles made of polyurethane foam (Synbone®), with heights of 18, 14, and 10 mm were used to create a FEA model with a unilateral straight-line fracture, fixated with a standard commercially available 6-hole 2 mm titanium miniplate. Two different FEA programs were used for the comparison, namely: Solidworks and Comsol Multiphysics. The FEA outcomes were compared with a series of mechanical tests with polymeric models fixed in a customised device and loaded onto a mechanical test bench. Results: First, the study illustrated that the optimal plate position appeared to be the upper border. Second, lower mandibular height increases instability and requires a stronger osteosynthesis system. Conclusions: FEA’s and polymeric model testing outcomes of unilateral non-comminuted fractures were highly comparable with current opinions of mandibular fracture management. The promising outcome of this study makes it worthwhile to do more extensive analysis in order to determine whether FEA alone is sufficient for optimisation of fracture management.
    Źródło:
    European Journal of Translational and Clinical Medicine; 2023, 6, 2; 10-25
    2657-3148
    2657-3156
    Pojawia się w:
    European Journal of Translational and Clinical Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Stresses and Forces on the Orthodontic System by Using Numerical Simulation of the Finite Elements Method
    Autorzy:
    Ferčec, J.
    Glišić, B.
    Šćepan, I.
    Marković, E.
    Stamenković, D.
    Anžel, I.
    Flašker, J.
    Rudolf, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418115.pdf
    Data publikacji:
    2012-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.70.Dh
    81.40.Jj
    87.10.Kn
    87.19.Rr
    Opis:
    This study was addressed to use knowledge about the orthodontic system with numerical simulation of the finite elements method. For the first time we simulated the stresses on the orthodontic system and, in this manner, calculated the orthodontic force on the tooth. A 3D orthodontic model or orthodontic system was designed resembling moderate crowding in the dental arch with all supporting structures. CATIA V5 computer software was used to set up a model for the orthodontic system and ABAQUS was used for simulation of the stresses on the orthodontic system. Our attention was focused on the stresses on the tooth lateral incisor and its periodontal ligament. The results of the numerical simulation showed complex stresses on the tooth lateral incisor and its periodontal ligament. In this paper there is presented a calculation of the orthodontic force acting on the tooth lateral incisor due to the orthodontic wire. This orthodontic force was calculated from the stresses on the bracket. The calculated orthodontic force was in the area which is considered as the optimal orthodontic force for movement of the tooth.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 4; 659-665
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Properties of Plastically Deformed Copper
    Autorzy:
    Trajić, J.
    Rudolf, R.
    Anžel, I.
    Romčević, M.
    Lazarević, N.
    Mirić, M.
    Lazarević, Z.
    Hadžić, B.
    Romčević, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537910.pdf
    Data publikacji:
    2010-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.-e
    78.30.j
    78.40.kc
    Opis:
    Pure copper (99.99), prepared in the sample of square cross-section (10 × 10 $mm^{2}$) and length about 50 mm, was extremely plastically deformed with the repeated application of Equal Channel Angular Pressing (ECAP). ECAP was applied as an effective technique for producing bulk nano-scaled structures. Optical properties of the sample were investigated using Raman spectroscopy. Two types of lines: narrow (with width of ≈ 7 $cm^{-1}$) and wide ( ≈ 40 $cm^{-1}$) are registered. Existence of two types of lines indicates that in the specimen exists nano-sized crystal structures of both Cu and CuO related with three dimensional amorphous boundary spaces, which indicates that plastic deformation of the sample did not lead to total amorphisation of the specimen.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 5; 791-793
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical and Magnetic Properties of PbTe(Ni)
    Autorzy:
    Romčević, N.
    Trajić, J.
    Romčević, M.
    Stojanović, D.
    Kuznetsova, T.
    Khokhlov, D.
    Dobrowolski, W.
    Rudolf, R.
    Anžel, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808059.pdf
    Data publikacji:
    2009-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.20.-e
    63.20.Kr
    78.30.-j
    Opis:
    Far-infrared and magnetic properties of Ni doped PbTe ($Z_Ni$ = 1× $10^{19}$ at./$cm^{3}$) single crystal are investigated in a broad range of temperature and magnetic fields. Far-infrared reflection spectra were analyzed using a fitting procedure based on the modified plasmon-two phonon interaction model. Together with the strong plasmon-two longitudinal optical phonon coupling we obtained a local mode of Ni at about 180 $cm^{-1}$. This mode intensity depends on temperature. Magnetic measurements shows that PbTe alloys doped with Ni reveals weak ferromagnetic interaction between magnetic ions.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 4; 805-807
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low-Frequency Raman Scattering from ZnO(Fe) Nanoparticles
    Autorzy:
    Kostić, R.
    Romčević, N.
    Romčević, M.
    Hadžić, B.
    Rudolf, R.
    Kuryliszyn-Kudelska, I.
    Dobrowolski, W.
    Narkiewicz, U.
    Sibera, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807817.pdf
    Data publikacji:
    2009-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.Fs
    78.67.-n
    Opis:
    Nanocrystalline samples of ZnO(Fe) were synthesized by wet chemical method. Samples were characterized by X-ray diffraction to determine the sample composition and the mean crystalline size. Low-frequency Raman modes were measured and assigned according to confined acoustic vibrations of spherical nanoparticles. Frequencies of these vibrational modes were analyzed in elastic continuum aproximation, which considers nanoparticle as homogeneous elastic sphere.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 1; 65-67
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Raman Spectroscopy of Multiphonon Emission Process in Ni-Doped PbTe
    Autorzy:
    Romčević, N.
    Trajić, J.
    Hadžić, B.
    Romčević, M.
    Stojanović, D.
    Lazarević, Z.
    Kuznetsova, T.
    Khokhlov, D.
    Rudolf, R.
    Anžel, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807841.pdf
    Data publikacji:
    2009-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.28.+d
    63.20.-e
    78.30.-j
    Opis:
    In this paper, we present room temperature unpolarized Raman scattering spectra of Ni doped PbTe single crystal sample. Crystal of PbTe(Ni) was grown by the Bridgman method. The Ni concentration in the sample used here was 1× $10^{19}$ at./$cm^{3}$. Well resolved peaks appear at about 126, 143, 181, 362 and 724 $cm^{-1}$. The modes at 126 and 143 $cm^{-1}$, which are also observed in other telluride compounds, originate from vibrations in $TeO_2$. We assume that the mode at about 181 $cm^{-1}$ is connected to excitations of a local phonon mode in the vicinity of an impurity atom (donor $Ni^{3+}$ state). Modes at about 362 $cm^{-1}$ and 724 $cm^{-1}$ are the second and fourth harmonic of a local phonon mode, registered here due to multiphonon emission.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 1; 91-92
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania nad częstością występowania zakażenia Toksoplasma gondii wśród pracowników rzeźni województwa krakowskiego
    Issledovanija chastoty zarazhenija Toksoplasma gondii sredi rabotnikov boen v krakovskom voevodstve
    Researsch on the frequency of occurrence of Toksoplasma gondii among slaughter-house workers in the Cracow District
    Autorzy:
    Starzyk, J.
    Przybylkiewicz, Z.
    Dolezal, M.
    Lutynski, R.
    Rudolf, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/840972.pdf
    Data publikacji:
    1956
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Annals of Parasitology; 1956, 02, 5
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania nad częstością występowania zakażenia Toksoplasma gondii wśród pracowników rzeźni województwa krakowskiego
    Issledovanija chastoty zarazhenija Toksoplasma gondii sredi rabotnikov boen v krakovskom voevodstve
    Researsch on the frequency of occurrence of Toksoplasma gondii among slaughter-house workers in the Cracow District
    Autorzy:
    Starzyk, J.
    Przybyłkiewicz, Z.
    Doleżał, M.
    Lutyński, R.
    Rudolf, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2180547.pdf
    Data publikacji:
    1956
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Źródło:
    Wiadomości Parazytologiczne; 1956, 02, 5; 53-54
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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