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    Wyświetlanie 1-12 z 12
    Tytuł:
    Optical Sensor for Measurements of the Blood Chamber Volume in the POLVAD Prosthesis - Static Measurements
    Autorzy:
    Konieczny, G.
    Pustelny, T.
    Marczyński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399376.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.-e
    42.81.-i
    07.07.Df
    47.63.Cb
    Opis:
    The paper presents results of extended static measurements of a newly developed optical system for temporary blood chamber volume measurements in the Polish Ventricular Assist Device. The paper additionally introduces a modified measurement stand and improvements of the measurements. Exemplary results acquired with principal components analysis are shown and future development plans of an optical measurement system are stated.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 479-482
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Pattern Recognition Applied for Volume Estimation of Blood Chamber with Matrix of Optical Sensors
    Autorzy:
    Marczyński, P.
    Konieczny, G.
    Pustelny, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399384.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Sy
    47.54.-r
    43.60.Lq
    Opis:
    The following article describes research on possibility of using pattern recognition algorithms in the optical measurement system for estimation of the blood chamber volume in the Polish Ventricular Assist Device (POLVAD). The optical system is being developed at the Department of Optoelectronics, Silesian University of Technology, Poland. Data analysis methods include a feature subset selection algorithm involving principal components analysis and objective function as quality criterion. The analysis takes into account 17 patterns reflecting particular volumes. The k-nearest neighbours method is used as pattern classifier. The pattern recognition system was initially designed for an array of gas sensors and this paper describes its further development.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 498-501
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quasi-Dynamic Testing of an Optical Sensor for Measurements of the Blood Chamber Volume in the POLVAD Prosthesis
    Autorzy:
    Konieczny, G.
    Pustelny, T.
    Marczyński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399377.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.-e
    42.81.-i
    07.07.Df
    47.63.Cb
    Opis:
    The article presents further developments of an optical system to be used in temporary blood volume measurements in the Polish ventricular assist device. The research focuses on quasi-dynamic measurements (flow rate of 5 ml/s). Characteristics of signals from selected configurations of optical transmitters and receivers are shown. A volume approximation using a PCA algorithm supported by a LRS function is introduced. Plans of further development are stated.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 483-485
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Researches on the Spectral Transmittance of Zinc Oxide ZnO Semiconductor Layers
    Autorzy:
    Struk, P.
    Pustelny, T.
    Opilski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506851.pdf
    Data publikacji:
    2010-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Hz
    42.25.-p
    42.82.Et
    68.35.Ct
    Opis:
    The paper deals with investigations concerning a wide-band gap material, viz. zinc oxide ZnO. Special attention has been devoted to the determination of the spectral transmission of zinc oxide layers deposited on quartz substrates. These investigations have made it possible to determine the optical spectral range in which this material is transparent as well as the edges of absorption. The presented investigations are valuable particularly concerning the application of zinc oxide in optoelectronic and photonic structures as well as in systems of waveguides and sensor layers of integrated optics.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 6; 1239-1241
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pattern Recognition Applied to Analysis of Gas Sensors Array Data
    Autorzy:
    Marczyński, P.
    Szpakowski, A.
    Tyszkiewicz, C.
    Pustelny, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418023.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.50.Sk
    07.07.Df
    Opis:
    For an array of eight chemoresistive gas sensors a computer pattern recognition system was built. Multivariate data analysis was performed for measurements of three gases' dilutions: hydrogen $(H_2)$, methane $(CH_4)$, and carbon monoxide $(CO)$. The pattern recognition system included a feature subset selection algorithm involving PCA and objective function. Dimensionality reduction was applied to two kinds of patterns: three aforementioned gases and six different concentrations of hydrogen. For patterns of the three gases, classification tests were performed using k-NN algorithm and N-fold based validation method.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 847-849
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Anatomic Structure of Pulmonary Arteries as a Source of Unreliability in Thermodilution Cardiac Output Measurement
    Autorzy:
    Gawlikowski, M.
    Pustelny, T.
    Przywara-Chowaniec, B.
    Struk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811516.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    47.63.Cb
    07.05.Tp
    87.19.Uv
    Opis:
    One of the most fundamental examination in intensive care medicine is cardiac output measurement, realized by pulmonary artery catherization. The thermodilution cardiac output estimation method is not resistant to various kinds of disturbances, which significantly decreases its sensitivity and specificity. The paper depicts investigations related to analysis of presumable new source of unreliability - asymmetric blood flow through pulmonary vessels. The investigations consisted of two phases: clinical examination (to obtain anatomical data) and computer modeling (to simulate the flow symmetry).
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6A; A-81-A-89
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gas Sensors Based on ZnO Structures
    Autorzy:
    Struk, P.
    Pustelny, T.
    Gołaszewska, K.
    Borysiewicz, M.
    Piotrowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399403.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Hz
    42.25.-p
    42.82.Et
    68.35.Ct
    Opis:
    The paper presents the results of investigations concerning sensor structures based on porous layers of zinc oxide (ZnO) sensitive to a selected gaseous environment. The investigations comprised analyses of the influence of the gaseous environment on the optical properties of a sensor structure, in particularly on the change of the spectral characteristics of optical transmission within the range of ultraviolet light and in the visible range. These presented investigations were carried out in such a gaseous environment as nitrogen dioxide $NO_2$ in synthetic air.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 567-569
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zinc Oxide Semiconductor for Photonics Structures Applications
    Autorzy:
    Struk, P.
    Pustelny, T.
    Pustelny, B.
    Gołaszewska, K.
    Kamińska, E.
    Piotrowska, A.
    Borysiewicz, M.
    Ekielski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506857.pdf
    Data publikacji:
    2010-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Hz
    42.70.-a
    42.82.-m
    68.35.Ct
    Opis:
    The paper presents investigations concerning the analysis of photonic structures with grating couplers. In the paper basic theoretically information on photonic structures with grating couplers is presented. The results of numerical investigations on photonic structures with grating couplers are discussed, too. Investigations show an essential influence of the geometrical parameters of grating couplers on the effectiveness of the input and output of optic power into and out of this photonic structure. In the paper the selected results of experimental realizations of photonic structures with grating couplers based on zinc oxide ZnO are presented.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 6; 1242-1245
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Results of Experiments with Fiber Pressure Sensor Applied in the Polish Artificial Heart Prosthesis
    Autorzy:
    Konieczny, G.
    Opilski, Z.
    Pustelny, T.
    Gacek, A.
    Gibinski, P.
    Kustosz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506799.pdf
    Data publikacji:
    2010-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.-e
    42.81.-i
    07.07.Df
    47.63.Cb
    Opis:
    The following paper introduces the problem of noninvasive pressure measurements in Polish artificial heart prosthesis. The pressure sensor is proposed and introduced, and preliminary tests are shown. The paper deals with the proposed sensing elements, requirement noninvasive solution and preliminary tests of polyurethane membrane transmission. The paper includes also experimental results of a fiber pressure sensor introducing noninvasive pressure measurements with pressure transmission through a polyurethane tube wall.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 6; 1183-1185
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties of GaN Nanocolumns Grown by Plasma - Assisted MBE on Si (111) Substrates
    Autorzy:
    Zytkiewicz, Z.
    Dluzewski, P.
    Borysiuk, J.
    Sobanska, M.
    Klosek, K.
    Witkowski, B.
    Setkiewicz, M.
    Pustelny, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492480.pdf
    Data publikacji:
    2011-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Hi
    81.05.Dz
    61.46.Km
    Opis:
    We report on growth of GaN nanocolumns by plasma assisted MBE on (111) silicon substrates and on their characterization. The nanocolumns nucleate on the substrate spontaneously without use of any catalyst, probably by the Volmer-Weber mechanism. Transmission electron microscopy analysis shows high crystalline quality of GaN nanocolumns and their good alignment with the c-axis being perpendicular to the substrate. Preliminary results on use of GaN nanocolumns in gas sensor devices are presented.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 6A; A-015-A-016
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Planar Optical Waveguides Based on Thin ZnO Layers
    Autorzy:
    Struk, P.
    Pustelny, T.
    Gut, K.
    Gołaszewska, K.
    Kamińska, E.
    Ekielski, M.
    Pasternak, I.
    Łusakowska, E.
    Piotrowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807757.pdf
    Data publikacji:
    2009-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Hz
    42.25.-p
    42.70.-a
    42.82.-m
    42.82.Et
    68.35.Ct
    Opis:
    The paper quotes the results of investigations concerning planar optical waveguides with a high value of the refractive index, achieved basing on a broad-band gap semiconductor ZnO, deposited on glass or quartz substrates. The investigations were focused on the properties of the waveguides, determining the modal characteristics, the attenuation coefficient and the structure of the surface.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 3; 414-418
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Planar Optical Waveguides for Application in Optoelectronic Gas Sensors
    Autorzy:
    Golaszewska, K.
    Kamińska, E.
    Pustelny, T.
    Struk, P.
    Piotrowski, T.
    Piotrowska, A.
    Ekielski, M.
    Kruszka, R.
    Wzorek, M.
    Borysiewicz, M.
    Pasternak, I.
    Gut, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811559.pdf
    Data publikacji:
    2008-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.82.Et
    07.07.Df
    42.79.Pw
    81.15.-z
    Opis:
    In the paper, the results of technological investigations on planar optical waveguides based on high band gap oxide semiconductors were presented. Investigations concerned the technologies of depositing very thin layers of: zinc oxide ZnO, titanium dioxide $TiO_2$ and tin dioxide $SnO_2$ on substrates of quartz glass plates. There were investigated both morphological structures of the produced layers and their optical properties. The paper also presents investigations on the technology of input-output light systems in the Bragg grating structures.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 6A; A-223-A-230
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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