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Wyszukujesz frazę "Lewandowski, I." wg kryterium: Autor


Tytuł:
Pseudotętniak gałęzi tętnicy nerkowej jako powikłanie heminefrektomii lewostronnej w leczeniu kamicy odlewowej u 3-letniego chłopca - opis przypadku
Renal artery pseudoaneurysm following partial nephrectomy of the left kidney due to staghorn urolithiasis in a 3-year-old boy - a case report
Autorzy:
Nachulewicz, P.
Lewandowski, I.
Sikora, P.
Brodzisz, A.
Szlazak, P.
Osemlak, P.
Kalinska-Lipert, A.
Rogowski, B.
Cielecki, C.
Wieczorek, P.
Powiązania:
https://bibliotekanauki.pl/articles/4133.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Źródło:
Medycyna Ogólna i Nauki o Zdrowiu; 2013, 19(48), 1
2083-4543
Pojawia się w:
Medycyna Ogólna i Nauki o Zdrowiu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dźwięk jako walor krajobrazu
Sound as a value of landscape
Autorzy:
Lewandowski, W.
Szumacher, I.
Powiązania:
https://bibliotekanauki.pl/articles/87700.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
dźwięk
krajobraz
sound
landscape
Opis:
The main aim of this paper is typology, valorization and mapping of soundscapes. Identification of sounds in landscape and mapping them can be very useful and practical for tourism, especially for ecotourism. For this reason the map “Attractiveness of landscape units for ecotourism” by S. Kulczyk and W. Lewandowski (2006) was used us a background. The research field was located at Polish uplands, within Niecka Nidziańska Region. Three types of landscape are represented these – the valley bottom landscape of Nida Valley, the loessy landscape within Garb Wodzisławski and chalk-gypsum landscape in Niecka Solecka. The project included two stages. In the first stage the map with potential sounds and their “borders” for each landscape units was done. In the second stage the final verification of this map with students during the summer practice in 2008 was conducted. They were asked to identify sounds in the area and to map them. The results of the project confirmed that sound is a very important part of landscape and it should be taken into account by estimating the value of landscape for ecotourism. Some not attractive units on the map “Attractiveness of landscape units for ecotourism” appeared us an attractive because of their sounds (for instance agriculture fields). Some attractive fields lost their value because of noise from gypsum-mine or the road. Natural and artificial sounds were recognized within the research area. For agriculture landscape of Ponidzie the most characteristic sound is skylark (Alauda arvensis) song. Sounds smoothly change in time and space. Borders delimitated on the basis of visual changes do not exist for them. For this purpose it would be better to speak about sound in landscape than about soundscapes. This kind of research should be continuing by interdisciplinary team including ornithologists.
Źródło:
Prace Komisji Krajobrazu Kulturowego; 2008, 11; 54-62
1896-1460
2391-5293
Pojawia się w:
Prace Komisji Krajobrazu Kulturowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie zjawiska koalescencji podczas zderzeń strug cieczy
Studies of coalescence during collision of liquid jets
Autorzy:
Lewandowski, A.
Zbiciński, I.
Powiązania:
https://bibliotekanauki.pl/articles/2071223.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
koalescencja
kolizja kropel
kozłowanie
rozpylanie
coalescence
droplets collisions
bouncing
spraying
Źródło:
Inżynieria i Aparatura Chemiczna; 2010, 3; 67-68
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and microencapsulation efficiency of foamed spray-dried sunflower oil
Autorzy:
Lewandowski, A.
Czyżewski, M.
Zbiciński, I.
Powiązania:
https://bibliotekanauki.pl/articles/185119.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
suszenie rozpryskowe
emulsja
pienienie
emulsion
spray drying
foaming
Opis:
An analysis of the effect of feed foaming on the efficiency of sunflower oil encapsulation on selected product properties is presented in the paper. Experiments were carried out in a pilot-plant concurrent spray dryer using the gas-admixing technique. The analysis of the product properties showed that the application of foaming makes it possible to control final product properties, e.g. apparent density, bulk density, distribution of particle diameters, etc. at a high efficiency of sunflower oil encapsulation.
Źródło:
Chemical and Process Engineering; 2012, 33, 1; 95-102
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of the Josephson Multi-Junction Systems with Junctions Characterized by Non-Sinusoidal Current - Phase Relationship
Autorzy:
Abal'osheva, I. S.
Lewandowski, S. J.
Powiązania:
https://bibliotekanauki.pl/articles/2041445.pdf
Data publikacji:
2004-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.50.+r
85.25.Am
85.25.Dq
Opis:
It is shown that the inclusion of junctions characterized by non-sinusoidal current - phase relationship in the systems composed of multiple Josephson junctions - results in the appearance of additional system phase states. Numerical simulations and stability considerations confirm that these phase states can be realized in practice. Moreover, spontaneous formation of the grain boundary junctions in high-T$\text{}_{c}$ superconductors with non-trivial current-phase relations due to the d-wave symmetry of the order parameter is probable. Switching between the phase states of multiple grain boundary junction systems can lead to additional 1/f noise in high-T$\text{}_{c}$ superconductors.
Źródło:
Acta Physica Polonica A; 2004, 106, 5; 687-691
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of the Multi-element Synthetic Transmit Aperture Method for Medical Ultrasound Imaging Applications
Autorzy:
Tasinkevych, Y.
Trots, I.
Nowicki, A.
Lewandowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/177208.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ultrasound imaging
synthetic aperture
beamforming
Opis:
The paper presents the optimization problem for the multi-element synthetic transmit aperture method (MSTA) in ultrasound imaging applications. The optimal choice of the transmit aperture size is made as a trade-off between the lateral resolution, penetration depth and the frame rate. Results of the analysis obtained by a developed optimization algorithm are presented. The maximum penetration depth and lateral resolution at given depths are chosen as optimization criteria. The results of numerical experiments carried out in MATLAB Ž using synthetic aperture data of point reflectors obtained by the FIELD II simulation program are presented. The visualization of experimental synthetic aperture data of a tissue mimicking phantom and in vitro measurements of the beef liver performed using the SonixTOUCH Research system are also shown.
Źródło:
Archives of Acoustics; 2012, 37, 1; 47-55
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cumulative method of the image reconstruction in synthetic aperture. Experimental results
Autorzy:
Wójcik, J.
Trots, I.
Lewandowski, M.
Nowicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/331922.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
An analytical model of imaging using synthetic aperture (SA) methods is presented. This model takes into account: fundamental features of an environment, of an electric transmission/reception path and a description of SA structure – possible schemes of transmission, reception and image formation. Then two schemes are analyzed: a proposed cumulative synthetic transmit aperture (CSTA) and for comparison of the standard STA schemes. For both methods identical basic parameters – equal sequences of transmit and receive transducers were applied. The distinctive feature of CSTA is gathering (summing up) echoes of subsequent transmissions in one acquisition matrix sufficient for image reconstruction. In traditionally applied STA methods a separate acquisition matrix for each transmission is created. Therefore there are a dozen to several dozen more matrices and the time of image reconstruction is at least several times longer than in CSTA. The presented experimental results obtained using wire and tissue mimicking phantoms have shown the comparable imaging quality in both methods.
Źródło:
Hydroacoustics; 2012, 15; 195-206
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Golay Coded Sequences in Synthetic Aperture Imaging Systems
Autorzy:
Trots, I.
Tasinkevych, Y.
Nowicki, A.
Lewandowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/176941.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ultrasound imaging
synthetic aperture
beamforming
radiation pattern
coded sequences
Golay codes
Opis:
The paper presents the theoretical and experimental study of synthetic transmit aperture (STA) method combined with Golay coded transmission for medical ultrasound imaging applications. The transmission of long waveforms characterized by a particular autocorrelation function allows to increase the total energy of the transmitted signal without increasing the peak pressure. It can also improve signal- to-noise ratio and increase the visualization depth maintaining the ultrasound image resolution. In the work the 128-element linear transducer array with 0.3 mm pitch excited by the 8 and 16-bits Golay coded sequences as well as a one cycle at nominal frequencies 4 MHz were used. The comparison of 2D ultrasound images of the tissue mimicking phantoms is presented to demonstrate the benefits of coded transmission. The image reconstruction was performed using synthetic STA algorithm with transmit and receive signals correction based on a single element directivity function.
Źródło:
Archives of Acoustics; 2011, 36, 4; 913-926
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-Element Synthetic Transmit Aperture in Medical Ultrasound Imaging
Autorzy:
Trots, I.
Nowicki, A.
Lewandowski, M.
Tasinkevych, Y.
Powiązania:
https://bibliotekanauki.pl/articles/177855.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ultrasound imaging
synthetic aperture
beamforming
Opis:
Synthetic aperture (SA) technique is a novel approach to present day commercial systems and has previously not been used in medical ultrasound imaging. The basic idea of SA is to combine information acquired simultaneously from all directions over a number of emissions and to reconstruct the full image from these data. The paper presents the multi-element STA (MSTA) method for medical ultrasound imaging. The main difference with the STA approach is the use of a few elements in the transmit mode in contrast to a single element aperture. This allows increasing the system frame rate, decreasing the number of emissions, and provides the best compromise between the penetration depth and lateral resolution. Besides, a modified MSTA is proposed with a corresponding RF signal correction in the receive mode, which accounts for the element directivity property. In the experiments a 32-element linear transducer array with 0.48 mm interelement spacing and a burst pulse of 100 ns duration were used. Two elements wide transmission aperture was used to generate an ultrasound wave covering the full image region. The comparison of 2D ultrasound images of a tissue mimicking phantom obtained using the STA and MSTA methods is presented to demonstrate the benefits of the second one.
Źródło:
Archives of Acoustics; 2010, 35, 4; 687-699
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Globalne ocieplenie – przyczyny, skutki oraz zapobieganie zmianom klimatu
Global warming – causes, effects and climate change prevention
Autorzy:
Kurowska, I.
Konopko, A.
Świsłocka, R.
Świderski, G.
Lewandowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/403073.pdf
Data publikacji:
2015
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
globalne ocieplenie
gazy cieplarniane
zmiana klimatu
global warming
greenhouse gases
climate change
Opis:
Efekt cieplarniany stał się w ostatnich latach jednym z głównych problemów świata. Globalne ocieplenie wpływa negatywnie na środowisko. Wiele gatunków roślin i zwierząt, które nie mogą przystosować się do zmian klimatycznych może wyginąć. Wpływa ono także niekorzystnie na ekonomię i infrastrukturę państw. Organizowane są liczne konferencje odnośnie zmiany klimatu, których celem jest poszukiwanie rozwiązań służących redukcji emisji gazów cieplarnianych. Na konferencjach w Kioto i Paryżu powstały protokoły odnośnie ograniczenia emisji tych gazów. Protokół paryski przedstawia długoterminową strategię przeciwdziałania globalnemu ociepleniu. Zakłada on redukcję gazów cieplarnianych do roku 2050, o co najmniej o 60% w odniesieniu do roku 2010.
The greenhouse effect has become one of the major problems of the world in recent years. Global warming has a negative effect on the environment. Many species of plants and animal that cannot adapt to climate change could become extinct. It also affect negatively on the economy and infrastructure of states. Numerous conferences relating to climate change are organized, aimed at finding solutions to reduce greenhouse gas emissions. At conferences in Kyoto and Paris protocols were created concerning the limitation of emissions of these gases. Paris Protocol represents a longterm strategy to combat global warming. It assumes the reduction of greenhouse gases by 2050, at least 60% for 2010.
Źródło:
Budownictwo i Inżynieria Środowiska; 2015, 6, 3; 119-130
2081-3279
Pojawia się w:
Budownictwo i Inżynieria Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł

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