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    Wyświetlanie 1-7 z 7
    Tytuł:
    The effects of lack of movement in sows during pregnancy period on cortisol, acute phase proteins and lymphocytes proliferation level in piglets in early postnatal period
    Autorzy:
    Kulok, M.
    Wojtas, K.
    Ciorga, M.
    Pejsak, Z.
    Kołacz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087242.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lack of movement
    gestation crates
    sows
    stress
    piglets
    cortisol
    acute phaseprotein
    immunity
    Źródło:
    Polish Journal of Veterinary Sciences; 2021, 24, 1; 85-92
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compact QCL driver for free-space transmitter
    Autorzy:
    Mikołajczyk, J.
    Garlińska, M.
    Wesołowski, M.
    Wojtas, J.
    Bielecki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/201659.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    free space optics
    laser communication
    quantum cascade lasers
    laser driver
    Opis:
    The paper presents investigations of a free space optical transmitter operating with quantum cascade lasers. The main goal of the research was to determine influence of lasers driver parameters on an optical data link performance. Using some commercial driving devices, the laser pulse limitations of power, repetition rate and time duration have been observed. In the paper, the preliminary results of the designed laser driver are described. The driver was developed at the Institute of Optoelectronics, MUT in cooperation with scientists from the Faculty Electrical Engineering, WUT. It is characterized by high current efficiency, high pulse repetition rate, and compact construction. Additionally, the driver also includes a controller of Peltier modules
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 763-768
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applying CEAS method to UV, VIS, and IR spectroscopy sensors
    Autorzy:
    Wojtas, J.
    Mikołajczyk, J.
    Nowakowski, M.
    Rutecka, B.
    Medrzycki, R.
    Bielecki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/200113.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CEAS
    N2O
    NO
    NO2 detection
    optoelectronic sensor
    Opis:
    In the paper, several applications of Cavity Enhanced Absorption Spectroscopy (CEAS) for trace mater detection are described. NO2 sensor was constructed using this technique with blue-violet lasers (395–440 nm). The sensor sensitivity reaches the level of single ppb and it was applied in security portal. For detection of two gases at the same time, two-channel sensor was constructed. Used method allows a significant reduction in the cost of optoelectronic CEAS sensor designed to measure of concentrations of many gases simultaneously. Successful monitoring of N2O and NO in the air requires high precision mid-infrared spectroscopy. The constructed sensors are able to measure concentration at ppb level. These sensors might be used for monitoring of atmospheric purity as well as for detection of explosives.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 415-418
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transmitter with quantum cascade laser for free space optics communication system
    Autorzy:
    Gutowska, M.
    Pierścińska, D.
    Nowakowski, M.
    Pierciński, K.
    Szabra, D.
    Mikołajczyk, J.
    Wojtas, J.
    Bielecki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/200097.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optical link
    quantum cascade laser
    laser communications
    Opis:
    The paper presents results of experimental tests of the quantum cascade laser from Alpes Lasers company in terms of its application in the optic communication system in an open space. The measurements involved the current – voltage characteristics while measuring also the average power of emitted radiation, and spectral characteristics for different temperatures and different laser pulse durations. The duration of laser pulses was matched to parameters used in telecommunication interfaces. The construction of the transmitter module which uses the tested laser is also presented.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 419-423
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Free-Space Optics Development
    Autorzy:
    Mikołajczyk, J.
    Bielecki, Z.
    Bugajski, M.
    Piotrowski, J.
    Wojtas, J.
    Gawron, W.
    Szabra, D.
    Prokopiuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/221245.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optical communications
    open path laser communications
    line of sight communications
    free space optics
    Opis:
    The article presents state of work in technology of free-space optical communications (Free Space Optics - FSO). Both commercially available optical data links and their further development are described. The main elements and operation limiting factors of FSO systems have been identified. Additionally, analyses of FSO/RF hybrid systems application are included. The main aspects of LasBITer project related to such hybrid technology for security and defence applications are presented.
    Źródło:
    Metrology and Measurement Systems; 2017, 24, 4; 653-674
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explosives vapors–concentrating and optoelectronic detection
    Autorzy:
    Wojtas, J.
    Rutecka, B.
    Popiel, S.
    Nawała, J.
    Wesołowski, M.
    Mikołajczyk, J.
    Cudziło, S.
    Bielecki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/221395.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    explosives concentrator
    explosive detection
    optoelectronic sensors
    CEAS sensors
    Opis:
    Detection of explosives vapors is an extremely difficult task. The sensitivity of currently constructed detectors is often insufficient. The paper presents a description of an explosive vapors concentrator that improves the detection limit of some explosives detectors. These detector s have been developed at the Institute of Optoelectronics. The concentrator is especially dedicated to operate with nitrogen oxide detectors. Preliminary measurements show that using the concentrator, the recorded amount of nitrogen dioxide released from a 0.5 ng sample of TNT increases by a factor of approx. 20. In the concentrator an induction heater is applied. Thanks to this and because of the miniaturization of the container with an adsorbing material (approx. 1 cm3), an extremely high rate of tempera ture growth is achieved (up to 500°C within approx. 25 s). The concentration process is controlled by a microcontroller. Compact construction and battery power supply provide a possibility of using the concentrator as a portable device.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 2; 177-190
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    System of Optoelectronic Sensors for Breath Analysis
    Autorzy:
    Mikołajczyk, J.
    Wojtas, J.
    Bielecki, Z.
    Stacewicz, T.
    Szabra, D.
    Magryta, P.
    Prokopiuk, A.
    Tkacz, A.
    Panek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/221463.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    breath analyses
    biomarkers
    laser absorption spectroscopy
    CEAS
    MUPASS
    medical screening
    Opis:
    The paper describes an integrated laser absorption system as a potential tool for breath analysis for clinical diagnostics, online therapy monitoring and metabolic disorder control. The sensors operate basing on cavity enhanced spectroscopy and multi-pass spectroscopy supported by wavelength modulation spectroscopy. The aspects concerning selection of operational spectral range and minimization of interference are also discussed. Tests results of the constructed devices collected with reference samples of biomarkers are also presented. The obtained data provide an opportunity to analyse applicability of optoelectronic sensors in medical screening.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 3; 481-489
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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