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Wyszukujesz frazę "Walczak, R." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Lab-on-a-chip fluorescence detection with image sensor and software-based image conditioning
    Autorzy:
    Walczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/202285.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fluorescence
    microfluidics
    lab-on-a-chip
    point-of-care
    Opis:
    The fluorometric detection in lab-on-a-chip devices for life-sciences is one of the main detection methods. Well know from “large-scale” analytical chemistry methodologies and instrumentation has been applied in lab-on-a-chip solutions. In most cases, optical instrumentation for fluorescence induction and detection is based on configuration and components borrowed from large laboratory instruments. As a result, optical instrumentation surrounding lab-on-a-chip is bulky, expensive and dedicated for operation only inside laboratory. In this paper a discussion on fluorescence detection in lab-on-a-chip is carried out. A novel image sensor – based detection instrumentation co-working with a “clever” software is described. Instrumentation is dedicated for operation in portable and low-cost devices for different life-science applications. Examples of applications of the novel method and instrumentation co-working with various lab-on-a-chips are presented on the base of author’s works.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 2; 157-165
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Inkjet 3D printing – towards new micromachining tool for MEMS fabrication
    Autorzy:
    Walczak, R,
    Powiązania:
    https://bibliotekanauki.pl/articles/200235.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    inkjet 3D printing
    MEMS
    micromachining
    lab-on-a-chip
    mikroobróbka
    druk atramentowy
    Opis:
    Three-dimensional (3D) printing has the potential to transform science and technology by creating bespoke, low-cost appliances that previously required dedicated facilities in order to be made. An attractive and promising research field comes in the form of using 3D printing to create MEMS, including microfluidic structures. In this paper, a discussion on applicability of inkjet 3D printing (i3Dp) for MEMS fabrication is presented on the base of works carried out by a team led by the author.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 2; 179-186
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tightness and material aspects of bolted flange connections with gaskets of nonlinear properties exposed to variable loads
    Autorzy:
    Walczak, R.
    Pawlicki, J.
    Zagórski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/355970.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    material
    bolted flange connection
    gasket
    tightness
    Opis:
    Tightness and material aspects of bolted flange connections with gaskets of nonlinear properties exposed to variable loads The paper presents the problems regarding bolted flange connections with gaskets used in chemical, petrochemical and energy industry. The aim of the research is to present state of knowledge regarding pipelines and apparatus in industrial installations and rules and regulations regarding flange connections tightness. Additionally a calculation example regarding flange connection according to ASME VIIIDIV 1 requirement and then detailed Finite Element Analysis presented; impact of nonlinear material properties (gasket loading unloading curves) on the connection tightness for complex loading programme is shown. It is finally concluded that in addition to usual design calculations more precise calculation is needed to fully verify behaviour of sealed connection at complex extreme variable loadings. Material aspect is very important at designing, testing, service and maintenance; taking it into consideration may avoid many problems related to safe exploitation.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1409-1416
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field-emission light sources for lab-on-a-chip microdevices
    Autorzy:
    Górecka-Drzazga, A.
    Cichy, B.
    Szczepańska, P.
    Walczak, R.
    Dziuban, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/201010.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lab-on-a-chip
    field emission
    light source
    microcytometer
    Opis:
    Microfluidic devices called lab-on-a-chips utilize two kinds of characterization of a biosample, which are based on spectrofluorimetric and spectrophotometric methodologies. Lab-on-a-chips are equipped with an optical instrumentation and a software system that allow detecting of the optical signals and their processing into spectral characteristics. In the paper, technology of lab-on-a-chip (cytometer microdevice) and miniature silicon-glass field-emission light source (FELS) is described. Electrons emitted from a silicon cathode covered with carbon nanotubes excite light emission from nanocrystalline rare earth doped yttrium oxide phosphor (anode). The emitted light can be precisely tailored to the main absorption line of a fluorescent marker. The presented system has been successfully used for testing of the cow embryos as well as fluorescent-marked porcine oocytes.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 1; 13-17
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Annular Array Transducer and Matched Amplifier for Therapeutic Ultrasound
    Autorzy:
    Secomski, W.
    Nowicki, A.
    Wójcik, J.
    Lewandowski, M.
    Walczak, M.
    Tymkiewicz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/177840.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ultrasonic therapy
    annular array transducer
    ultrasonic field
    Opis:
    The use of therapeutic ultrasound continues to grow. A focused ultrasonic wave can increase the tissue temperature locally for the non-invasive cancer treatment or other medical applications. The authors have designed a seven-element annular array transducer operating at 2.4 MHz. Each element was excited by sine burst supplied by a linear amplifier and FPGA control circuits. The acoustic field, generated by a transducer was initially numerically simulated in a computer and next compared to water tank hydrophone measurements performed at 20, 40 and 60 mm focal depth. The results showed good agreement of the measurements with theory and the possibility to focus the ultrasound in the preselected area. The total acoustic power radiated by the annular array was equal to 2.4 W.
    Źródło:
    Archives of Acoustics; 2010, 35, 4; 653-660
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the Shot Peening on Surface Properties and Tribological Performance of Ti-6Al-4V Alloy Produced by Means of DMLS Technology
    Autorzy:
    Żebrowski, R.
    Walczak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351652.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    additive manufacturing
    shot peening
    titanium alloys
    wear
    tribology
    Opis:
    The purpose of the present paper was to investigate the effect of shot peening on the condition of the surface layer and abrasion resistance of specimens made of Ti-6Al-4V titanium alloy produced by Direct Metal Laser Sintering (DMLS) process. The specimens have been produced by means of EOSINT M280 system dedicated for laser sintering of metal powders and their surfaces have been subjected to the shot peening process under three different working pressures (0.2, 0.3 and 0.4 MPa) and by means of three different media i.e. CrNi steel shot, crushed nut shells and ceramic balls. The specimens have been subjected to profilometric analysis, to SEM examinations, microhardness tests and to tribological tests on ball-on-disc stand in Ringer fluid environment. The general results of all tests indicate to favourable effect of shot peening process on the hardness and tribological performance of titanium alloy.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 377-386
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model poziomu wody w walczaku oraz jego praktyczne wykorzystanie do optymalizacji automatycznej regulacji poziomu wody w walczaku pracującego w warunkach zrzutu obciążenia na potrzeby własne
    The drum water level model and its application to automatic control system optimization of water level during load dump to cover own demand requirements
    Autorzy:
    Kielian, R.
    Lipiński, M.
    Obaleński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/172947.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    walczak
    automatyczna regulacja
    poziom wody
    zrzut
    obciążenie
    drum
    automatic adjustment
    water level
    drop
    load
    Opis:
    W artykule przestawiono model poziomu wody w walczaku zaprojektowany w środowisku MATLAB/ Simulink, który pozytywnie zweryfikowano podczas badań symulacyjnych w różnych warunkach ruchowych typowych dla obiektu energetycznego o mocy 200 MW, a następnie wykorzystano do modyfikacji układu automatycznej regulacji poziomu wody w walczaku w warunkach zrzutu obciążenia bloku do poziomu potrzeb własnych. Uzyskano wyraźną poprawę jakości regulacji poziomu wody w walczaku w tych warunkach zrzutu.
    The paper presents the drum water level model implemented in MATLAB/SIMULINK. The model was positively verified during simulations under different operating condition, typical for 200 MW power plant. Subsequently the model was used to modify the drum water level control system during the dump of the unit load to the level corresponding to the case of covering the own demand requirements. An improvement of the drum water level quality of control was achieved.
    Źródło:
    Archiwum Energetyki; 2013, 43, 1/2; 49-59
    0066-684X
    Pojawia się w:
    Archiwum Energetyki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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