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    Wyświetlanie 1-13 z 13
    Tytuł:
    Posture Stability Evaluation Using Static Posturography in Patients after Cruciate Ligament Reconstruction
    Autorzy:
    Kubisz, L.
    Werner, H.
    Bosek, M.
    Weiss, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1504202.pdf
    Data publikacji:
    2011-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.19.lu
    87.19.R-
    87.19.U-
    Opis:
    Ligament reconstruction is one of the surgical methods for treatment of anterior cruciate ligament injury. The main purpose of rehabilitation after surgical ligament reconstruction is to obtain maximal efficiency of knee joint, their stability and appropriate lower limbs encumbrance. Static posturography is one of the control, rehabilitative and diagnostic tools in such treatment. The purpose of the study was to evaluate the posture stability differences between healthy people and patients after anterior cruciate ligament reconstruction. The centre of pressure sway was registered using the standard posturography platform (Pro-med). During the test, the subject stood freely with eyes open and closed. In order to determine the stability of the subject, the average velocity of the centre of pressure sway, and the average accretion rate of surface area encircled by centre of pressure, a mean radius of centre of pressure and amount of its displacement were calculated. Parameters measured for the eyes closed posture were significantly greater for people after anterior cruciate ligament reconstruction, while differences between groups for eyes open test were statistically insignificant. This indicates impairment of the somatosensoric posture control system. It should be noted that selected stability indicators: an average velocity of the centre of pressure sway, its anterior-posterior and mediolateral components, a mean radius of centre of pressure and a mean accretion rate of surface area encircled by centre of pressure varied in both groups.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 6A; 957-960
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Annealing on the Crystal Structure and Microstructure of Pr Doped $ZrO_{2}-Y_{2}O_{3}$ Nanocrystals
    Autorzy:
    Werner-Malento, E.
    Paszkowicz, W.
    Fidelus, J.
    Godlewski, M.
    Yatsunenko, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1550117.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    61.66.Fn
    81.40.-z
    Opis:
    Rare-earth doped nanocrystalline yttria-stabilized zirconia (YSZ, $ZrO_{2}-Y_{2}O_{3}$) is, recently, a subject of studies because of its luminescent properties. The luminescence may be strongly influenced by the crystal structure and microstructure of the material. In this work, the X-ray diffraction study for Pr doped YSZ nanocrystals is presented. The phase composition dependence on the $Y_{2}O_{3}$ content and on heat treatment conditions is quantitatively determined using the Rietveld method and the similarities and differences between the present data for doped samples and earlier reported data for undoped material are discussed. A formation of high symmetry phases (cubic and tetragonal) is observed for high yttria content in agreement with general tendencies observed in literature for undoped samples.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 91-97
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Equation of State of Zircon-Type $TbVO_{4}$
    Autorzy:
    Minikayev, R.
    Paszkowicz, W.
    Werner-Malento, E.
    Lathe, C.
    Dąbkowska, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538929.pdf
    Data publikacji:
    2010-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    62.50.-p
    61.50.Ks
    64.30.Jk
    Opis:
    High-pressure energy-dispersive X-ray diffraction study were performed on zircon-type phase of terbium orthovanadate, $TbVO_{4}$, in the pressure range up to 7 GPa. For analysis of the collected diffraction spectra, Le Bail refinements were performed. The values of bulk modulus and its pressure derivative ($B_0$ = 121 GPa, B' = 4.1) were obtained from fitting of the second-order Birch-Murnaghan equation of state. The equation of state derived for $TbVO_{4}$, is compared with earlier data based on the Raman spectroscopic studies and with data of several other rare-earth orthovanadates.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 2; 319-322
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Channeling Study of Co and Mn Implanted and Thermally Annealed Wide Band-Gap Semiconducting Compounds
    Autorzy:
    Ratajczak, R.
    Werner, Z.
    Barlak, M.
    Pochrybniak, C.
    Stonert, A.
    Zhao, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402209.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.-j
    61.72.-y
    81.05.-t
    82.80.-d
    85.40.-e
    Opis:
    The defect build-up, structure recovery and lattice location of transition metals in ion bombarded and thermally annealed ZnO and GaN single crystals were studied by channeled Rutherford backscattering spectrometry and channeled particle-induced X-ray emission measurements using 1.57 MeV ⁴He ions. Ion implantation to a fluence of 1.2×10¹⁶ ions/cm² was performed using 120 keV Co and 120 keV Mn ions. Thermal annealing was performed at 800°C in argon flow. Damage distributions were determined using the Monte Carlo McChasy simulation code. The simulations of channeled Rutherford backscattering spectra reveal that the ion implantation leads to formation of two types of defect structures in ZnO and GaN such as point and extended defects, such as dislocations. The concentrations of both types of defects are at a comparable level in both structures and for both implanted ions. Differences between both implantations appear after thermal annealing where the Mn-doped ZnO reveals much better transition metals substitution and recovery effect.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 845-848
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Signature of the Spin Triplet Phase in $La_{0.7}Sr_{0.3}MnO_3$/$Yba_2Cu_3O_7$/$La_{0.7}Sr_{0.3}MnO_3$ Trilayers
    Autorzy:
    Przyslupski, P.
    Dybko, K.
    Werner-Malento, K.
    Aleshkevych, P.
    Wojcik, M.
    Sawicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1536907.pdf
    Data publikacji:
    2010-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Fk
    75.70.Cn
    77.84.Bw
    Opis:
    Differential dynamical subgap transport measurements were performed on LSMO/YBCO/LSMO trilayers to probe local evolution of the Andreev bound states which are manifested as the zero bias conductance peak. Dynamical conductivity dI/dV vs. magnetic field measured in current in plane and current perpendicular to plane geometries show nonmonotonic behavior with maximum at about 500 Oe. The shape of the zero bias conductance peak measured in current in plane geometry is sharp, whereas zero bias conductance peak measured in current perpendicular to plane geometry demonstrates V shape. These shapes of the zero bias conductance peak were predicted theoretically for unconventional p-wave spin triplet phase superconductor and superconductor with d-wave symmetry of the order parameter, respectively.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 2; 313-315
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Superconductivity of $MgB_2$ Layers Prepared on Silicon Substrate by Implantation of Magnesium Ions into Boron Substrate
    Autorzy:
    Trybuła, Z.
    Kempiński, W.
    Łoś, Sz.
    Kaszyńska, K.
    Trybuła, M.
    Piekoszewski, J.
    Werner, Z.
    Barlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1536977.pdf
    Data publikacji:
    2010-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.-b
    74.78.-w
    Opis:
    The results of investigation of the $MgB_2$ layers prepared on silicon substrate by implantation of Mg ions into boron substrate are presented. After implantation the annealing processes were carried out at temperatures 673 K, 773 K, and 873 K in a furnace in an atmosphere of flowing Ar-4%$H_2$ gas mixture. The samples were characterized by: four-probe electric conductivity measurements and magnetically modulated microwave absorption. Our results showed that due to silicon substrate the diffusion of implanted Mg ions into boron materials should be limited, and the superconducting phase forms a continuous $MgB_2$ layer and the resistivity for all samples fall down to zero below $T_{c}$. The transition temperature $T_{c}$ becomes higher with increasing annealing temperature: $T_{c}$=18 K (for annealing at $T_{A}$=673 K), $T_{c}$=20 K (for annealing at $T_{A}$=773 K), and $T_{c}$=27 K (for annealing at $T_{A}$=873 K).
    Źródło:
    Acta Physica Polonica A; 2010, 118, 2; 323-325
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ion Implantation and Transient Melting: A New Approach to Formation of Superconducting MgB$\text{}_{2}$ Phases
    Autorzy:
    Piekoszewski, J.
    Kempiński, W.
    Stankowski, J.
    Prokert, F.
    Richter, E.
    Stanisławski, J.
    Werner, Z.
    Szymczyk, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041609.pdf
    Data publikacji:
    2004-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.-b
    74.78.-w
    Opis:
    An attempt to synthesize superconducting MgB$\text{}_{2}$ inter-metallic compound from the liquid state is presented. The process consists of two steps. In the first one, boron ions are implanted into a magnesium substrate. In the second one, the near-surface region of such system is melted by short, intense hydrogen plasma pulses without necessity of annealing in Mg vapor. A magnetically modulated microwave absorption method was used to detect superconducting regions in the obtained MgB$\text{}_{2}$ layer. Percolation between nano-regions (islands) of MgB$\text{}_{2}$ has not been observed. However, a superconducting state of the insulated islands has been experimentally proven with transition temperatures T$\text{}_{C}$ as high as 31 K.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 6; 861-868
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multifunctional $La_{0.7}Sr_{0.3}MnO_3-YBa_2Cu_3O_7$ Heterostructures
    Autorzy:
    Przyslupski, P.
    Dybko, K.
    Tsarou, A.
    Werner-Malento, K.
    Sawicki, M.
    Laviano, F.
    Gozzellino, L.
    Mezzetti, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812263.pdf
    Data publikacji:
    2008-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Db
    74.72.Bk
    75.70.Cn
    Opis:
    Complex perovskite oxides exhibit a rich spectrum of functional responses such as: superconductivity, magnetism etc. Combination of different oxides in multilayered structures increases the number of physical responses. Heterogeneous oxide structures represent a new class of nanostructures. They consist of ferromagnetic $La_{0.67}Sr_{0.33}MnO_3$ (F-LSMO) manganite and superconducting $YBa_2Cu_3O_7$ (Sc-YBCO) cuprate. The interaction between the two order parameters gives rise to new physical effects. In this review we will discuss various physical effects obtained in the bilayer and trilayer heterostructures. For example, the LSMO/YBCO bilayer structures are used to study the mechanism of magnetic pinning. The other possibility is the fabrication of spin valve-like structures LSMO/YBCO/LSMO. The spin dependent transport in trilayer structure was studied taking into account crossed Andreev reflection and electron co-tunneling processes.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 1; 15-22
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Evolution of Superconducting Phase $MgB_x$
    Autorzy:
    Łoś, Sz.
    Kempiński, W.
    Piekara-Sady, L.
    Andrzejewski, B.
    Jurga, W.
    Kaszyńska, K.
    Piekoszewski, J.
    Werner, Z.
    Barlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812318.pdf
    Data publikacji:
    2008-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.-b
    74.78.-w
    Opis:
    Thin layers of $MgB_x$ were studied in order to define evolution of superconducting phase after Mg ions implantation into boron substrate. Three fluencies of energies 140, 80, and 40 keV were used to establish proper stoichiometry to synthesize homogeneous $MgB_2$ film. Additionally, the annealing processes were carried out at temperatures 400, 500, and 600°C in a furnace in an atmosphere of flowing $Ar-4%H_2$ gas mixture. The quality of the superconducting material was examined by magnetically modulated microwave absorption, and magnetic and resistivity measurements. The results showed that $T_c$ becomes higher with increasing annealing temperature. However, the fraction of superconducting phase decreases, due to partial evaporation of Mg ions and their deeper migration into boron substrate.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 1; 179-184
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Superconductivity in Indium Diffused GaAs
    Autorzy:
    Baranowski, J. M.
    Wójcik, P.
    Palczewska, M.
    Jabłoński, R.
    Weber, E. R.
    Yau, W. P.
    Sohn, H.
    Werner, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1921582.pdf
    Data publikacji:
    1992-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.Mq
    76.20.+q
    Opis:
    Superconductivity of indium diffused GaAs was investigated. The superconductivity in these samples was identified by the magnetic susceptibility and the characteristic field modulated microwave absorption. The static magnetic susceptibility was measured from 40 K down to 2.5 K. The result shows two distinctive diamagnetic contributions within 7 K-2.5 K range. These diamagnetic contributions were correlated with the excess of In and Ga metal in GaAs.
    Źródło:
    Acta Physica Polonica A; 1992, 82, 4; 670-673
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Magnetic Characterization οf $BiFeO_3$/$YBa_2Cu_3O_7$ Bilayers
    Autorzy:
    Werner-Malento, K.
    Tsarou, A.
    Dluzewski, P.
    Paszkowicz, W.
    Minikayev, R.
    Sawicki, M.
    van der Beek, Kees
    Konczykowski, M.
    Przyslupski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810309.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.78.Fk
    75.70.Cn
    77.84.Bw
    Opis:
    Bilayered epitaxial $BiFeO_3$/$YBa_2Cu_3O_7$ films were fabricated on (100) $[(LaAlO_3)_{0.3}(Sr_2TaAlO_6)_{0.7}]$ substrates by sputtering method. For structural comparison the bilayered $BiFeO_3$/$La_{0.67}Sr_{0.33}MnO_3$ films were also deposited on (100) $SrTiO_3$ substrates. A weak ferromagnetic moment is observed in $BiFeO_3$/$YBa_2Cu_3O_7$ films. The mechanism responsible for weak ferromagnetic moment arises presumably from the epitaxy strain induced canted antiferromagnetic structure.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 95-97
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Formation of Superconducting Regions of MgB_2 by Implantation of Boron Ions into Magnesium Substrate
    Autorzy:
    Trybuła, Z.
    Kempiński, W.
    Andrzejewski, B.
    Piekara-Sady, L.
    Kaszyński, J.
    Piekoszewski, J.
    Werner, Z.
    Richter, E.
    Prokert, F.
    Stanisławski, J.
    Barlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043433.pdf
    Data publikacji:
    2005-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.-b
    74.78.-w
    Opis:
    The results of investigation of the MgB$\text{}_{2}$ inter-metallic compound with the use of boron ions implantation and plasma pulse treatment are presented. The samples were characterized by: four-probe electric conductivity measurements, magnetically modulated microwave absorption, and magnetic measurements. For hydrogen and argon pulsed plasma treatment the samples with T$\text{}_{c}$ ranging from 10 K to 32 K were obtained. The superconducting phase does not form a continuous layer since the resistivity does not fall down to zero. Apparently, separate islands of superconducting phase are connected through metallic Mg paths. All samples are still below the percolation threshold.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 1; 165-170
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Light Absorption and Photoluminescence in Quantum Dots and Artificial Molecules
    Autorzy:
    Firsov, D.
    Vorobjev, L.
    Panevin, V.
    Fedosov, N.
    Shalygin, V.
    Samsonenko, J.
    Tonkikh, A.
    Cirlin, G.
    Andreev, A.
    Kryzhanovskaya, N.
    Tarasov, I.
    Pikhtin, N.
    Ustinov, V.
    Hanna, S.
    Seilmeier, A.
    Julien, F.
    Zakharov, N.
    Werner, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041673.pdf
    Data publikacji:
    2005-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.Fs
    Opis:
    Intraband absorption in n- and p-doped structures with InAs/GaAs quantum dots covered by InGaAs layers is studied both experimentally and theoretically. The absorption cross-section for p-type quantum dots was found to be significantly smaller than that for n-type quantum dots. Interband absorption bleaching under strong interband excitation is found and investigated in undoped quantum dot structures. Structures with artificial molecules were grown. Photoluminescence spectra and transmission electron microscopy images proves the presence of coupled symmetrical quantum dots.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 1; 158-162
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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