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Tytuł:
Acoustic System of Determining the Instantaneous Volume of the Blood Part of the Ventricular Assist Device POLVAD-EXT
Autorzy:
Konieczny, G.
Pustelny, T.
Opilski, Z.
Gawlikowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/176599.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustic Helmholtz’s
resonator
blood volume estimation
VAD
ventricular assist device
Opis:
The paper presents the results of investigations concerning the noninvasive method of estimating the actual volume of the blood chamber of the POLVAD-EXT type ventricular assist device (VAD) during its operation. The proposed method is based on the principle of Helmholtz’s acoustic resonance. Both the theory, main stages of the development of the measurement method as well as the practical implementation of the proposed method in the physical model of the POLVAD-EXT device are dealt with. The paper contains the results of static measurements by means of the proposed method (conducted at the Department of Optoelectronics, Silesian University of Technology) as well as the dynamic measurements taken at the Foundation of Cardiac Surgery Development (Zabrze, Poland) with the professional model of the human cardiovascular system. The results of these measurements prove that the proposed method allows to estimate the actual blood chamber volume with uncertainties below 10%.
Źródło:
Archives of Acoustics; 2014, 39, 4; 541-548
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Surface Plasmons in a Planar Waveguide System with Spectral Detection - Experimental Results
Autorzy:
Opilski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1506820.pdf
Data publikacji:
2010-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Mf
Opis:
The paper presents the results of experimental investigations concerning the plasmon resonance in a planar waveguide structure applied in the construction of sensors with spectral detection.
Źródło:
Acta Physica Polonica A; 2010, 118, 6; 1221-1228
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Surface Plasmons in a Planar Waveguide System with Spectral Detection - Results of Model Investigations
Autorzy:
Opilski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1506808.pdf
Data publikacji:
2010-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Mf
Opis:
The paper presents the results of numerical investigations of the phenomenon of plasmon resonance in a planar waveguide structure, applied in the construction of sensor with spectral detection.
Źródło:
Acta Physica Polonica A; 2010, 118, 6; 1215-1220
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Surface Plasmons in the Optical Planar Waveguide with Spectral Detection
Autorzy:
Opilski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1506807.pdf
Data publikacji:
2010-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.20.Mf
Opis:
The paper deals with investigations concerning the plasmon resonance in an optical planar waveguide structure, applied in the construction of sensors with spectral detection. The surface plasmons in a multi-layer planar structure (with complex refractive indices) have been described, as well as the way of numerical solutions of physical equations describing the propagating electromagnetic field in such structures. The physical interpretation of obtained results has been presented, too.
Źródło:
Acta Physica Polonica A; 2010, 118, 6; 1209-1214
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calibration and Laboratory Testing of Computer Measuring System 8AE-PD Dedicated for Analysis of Acoustic Emission Signals Generated by Partial Discharges Within Oil Power Transformers
Autorzy:
Witos, F.
Szerszeń, G.
Opilski, Z.
Setkiewicz, M.
Olszewska, A.
Duda, D.
Maźniewski, K.
Szadkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/177029.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multichannel system
calibration
acoustic emission
partial discharge
power oil transformers
Opis:
In the paper, there are presented a general description of the constructed measuring system 8AE-PD, the results of calibration of this system by the Hsu-Nielsen method as well as the testing of the measuring system during recording signals generated by Hsu-Nielsen sources in a steel plate and a modeled partial discharge (PD) source. There is also presented the methodology of investigations by the calibrated acoustic emission method. The results of analyses of PD signals coming from the modeled sources are given. In particular, there are described the properties of acoustic emission (AE) signals generated by the PDs as well as the dependencies of the peak-to-peak voltage Umm, the RMS voltage Urms and the descriptors of acronyms ADP and ADC on the apparent charge Q introduced by the modeled PD source. There are determined the limit values of the apparent charge Q introduced by the modeled PD source for which the recorded signal is identified as originating from the PDS.
Źródło:
Archives of Acoustics; 2017, 42, 2; 297-311
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gas sensors based on nanostructures of semiconductors ZnO and TiO2
Autorzy:
Pustelny, T.
Procek, M.
Maciak, E.
Stolarczyk, A.
Drewniak, S.
Urbańczyk, M.
Setkiewicz, M.
Gut, K.
Opilski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/201719.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gas sensors
nanostructures
TiO2
ZnO
Opis:
The paper presents a resistance structures with sensor layers based on nanostructures elaborated on the base of TiO2 and ZnO. The structures were tested concerning their sensitivities to the effects of nitrogen dioxide in the atmosphere of synthetic air. The TiO2 and ZnO nanostructures played the role of sensor layers. Investigations have proved that the elaborated resistance structures with TiO2 and ZnO layers are sensitive to the presence of NO2 in the atmosphere of synthetic air. The resistance of the structure amounted to about 20 in the case of ZnO structures and to about 200 in the case of TiO2 structures. The investigations confirmed that resistance structures with ZnO and TiO2, exposed to the effect of nitrogen dioxide in the atmosphere of synthetic air changes their resistances relatively fast. This indicates that such structures might be practically applied in sensors of nitrogen dioxide ensuring a short time of response.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 853-859
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of SAW Structures with Oxide Graphene Layer to Detection of Selected Gases
Autorzy:
Drewniak, S.
Pustelny, T.
Setkiewicz, M.
Maciak, E.
Urbańczyk, M.
Procek, M.
Opilski, Z.
Jagiello, J.
Lipinska, L.
Powiązania:
https://bibliotekanauki.pl/articles/1399339.pdf
Data publikacji:
2013-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Pa
82.47.Rs
07.07.Df
Opis:
In this paper we present the results of investigations of graphene oxide layers using the SAW structure (structure with surface acoustic wave propagated) exposed to the affect of low concentrations of hydrogen and nitrogen dioxide in synthetic air. During the measurements, the differential signal (from two measuring channels) was recorded. The sensing graphene oxide layer was deposited only on first channel, whereas the second channel was not covered by any additional layer. The tests were made with various concentrations of the analyzed gases and at various temperatures of the sensing structure during the measurements. Analyses were performed with special emphasis on the time response of the sensor structure to changes in the gas atmosphere.
Źródło:
Acta Physica Polonica A; 2013, 124, 3; 402-405
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Noninvasive acoustic blood volume measurement system for the POLVAD prosthesis
Autorzy:
Opilski, Z.
Konieczny, G.
Pustelny, T.
Gacek, A.
Kustosz, R.
Gawlikowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/200093.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heart prosthesis
medical acoustics
blood volume measurement system
Opis:
The following paper presents researches concerning a noninvasive real-time blood volume measurement system applied in POLVAD prosthesis. The system is based on the acoustic Helmholtz resonator principle. The basis of the measurement method, followed by the preliminary tests of the possibility of incorporating the Helmholtz resonance idea into the POLVAD prosthesis is shown. The paper includes the actual measurement system construction and test results, both static and dynamic obtained at the Foundation for Cardiac Surgery Development in Zabrze, Poland. Conclusions and future plans are presented too.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 429-433
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Research Concerning Measurements οf the POLVAD Blood Chamber Volume Based οn Helmholtzs Acoustic Resonator Principle
Autorzy:
Konieczny, G.
Opilski, Z.
Pustelny, T.
Powiązania:
https://bibliotekanauki.pl/articles/1493249.pdf
Data publikacji:
2011-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.79.-e
42.81.-i
07.07.Df
47.63.Cb
Opis:
The article presents researches concerning a system for a possible blood volume measurements applied in POLVAD prosthesis. The proposed solution is based on the Helmholtz resonance principle. The article shows the state of art in blood volume sensors for using in the POLVAD prosthesis and introduces a newly proposed solution. The construction of the sensor and the results of static tests are presented. The work is summarized with future development plans.
Źródło:
Acta Physica Polonica A; 2011, 120, 4; 688-692
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:
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:
Spectropolarimetric analyses of optical single mode SU8 waveguide layers
Autorzy:
Gut, K.
Opilski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/200815.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
interferometry
SU8 optical waveguides
optical sensors
interferometria
czujniki optyczne
światłowody
Opis:
The paper presents the principle of the operation of a spectropolarimetric interferometer. In a planar waveguide orthogonal modes of the TE and TM types can be excited for the entire visible light. During the propagation the difference of the phases between the modes was determined, which is the function of the length of the path of propagation, the difference of the effective refractive index (NTM-NTE) and the wavelength. At the output of this system the spectral distribution of intensity was recorded, the shape of which depends on the value of the refractive index of the cover of the waveguides.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 2; 349-352
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
State of the Work Diagram of the Artificial Heart
Autorzy:
Konieczny, G.
Opilski, Z.
Pustelny, T.
Maciak, E.
Powiązania:
https://bibliotekanauki.pl/articles/1807734.pdf
Data publikacji:
2009-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.79.-e
42.81.-i
07.07.Df
47.63.Cb
Opis:
This paper presents the results of investigations on novel pressure measurement methods to be for used in the project "Polish Artificial Heart". The investigations concerned possible pressure sensors for noninvasive blood pressure measurements in selected points around the pneumatic ventricular assist device (POLVAD). The fiber pressure sensor and the possibility of pressure measurements with piezofoils were tested. The paper includes preliminary results and development plans.
Źródło:
Acta Physica Polonica A; 2009, 116, 3; 344-347
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing of Partial Discharges in Generator Coil Bars with the Help of Calibrated Acoustic Emission Method
Autorzy:
Witos, F.
Gacek, Z.
Opilski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1811569.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.40.Le
43.60.Lg
52.80.s
77.22.Jp
84.70.+p
Opis:
Investigation results of acoustic emission signals coming from partial discharges within chosen generator coil bar, in relation to measurement results of apparent charge introduced by partial discharges sources, are presented in the article. Analysis is based on amplitude distributions calculated for acoustic emission signals, ordered at different measuring points for different values of the supply voltage. In order to assign acoustic emission signal to its advance degree a descriptor named by an acronym ADP (defined by authors) is calculated for each amplitude distribution. Descriptor families describing acoustic emission signals measured at particular measuring points (for different supply voltages) are presented in relation to apparent charge introduced by acoustic emission sources. These families concerning acoustic emission signals, measured at different measuring points for identical supply voltage, enable us to locate acoustic emission sources with maximum activity.
Źródło:
Acta Physica Polonica A; 2008, 114, 6A; A-249-A-258
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Humidity on the Resistance Structures with Graphene Sensor Layer
Autorzy:
Pustelny, T.
Setkiewicz, M.
Drewniak, S.
Maciak, E.
Stolarczyk, A.
Procek, M.
Urbańczyk, M.
Gut, K.
Opilski, Z.
Pasternak, I.
Strupinski, W.
Powiązania:
https://bibliotekanauki.pl/articles/1418032.pdf
Data publikacji:
2012-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.07.Df
42.81.Pa
82.47.Rs
Opis:
In the paper the results of investigations are presented concerning the influence of humidity of air on the resistance of a gas sensor structure with a graphene layer. The affects of nitrogen dioxide and humidity action on graphene were studied. We indicated that humidity might play an important role in determining the gas sensing properties of the graphene layer. In the paper it has been shown that in the case of a nitrogen oxide sensor, the reaction of $NO_2$ with water vapour can generate permanent defects in graphene.
Źródło:
Acta Physica Polonica A; 2012, 122, 5; 870-873
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 18

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