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    Wyświetlanie 1-4 z 4
    Tytuł:
    Mechanical transmission of Cryptosporidium parvum oocysts by flies
    Autorzy:
    Graczyk, T.K.
    Grimes, B.H.
    Knight, R.
    Szostakowska, B.
    Kruminis-Lozowska, W.
    Racewicz, M.
    Tamang, L.
    Dasilva, A.J.
    Myjak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/836790.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Cryptosporidium parvum
    cryptosporidiosis
    mechanical transmission
    fly
    oocyst
    Źródło:
    Annals of Parasitology; 2004, 50, 2
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical transmission of Cryptosporidium parvum oocysts by flies
    Autorzy:
    Graczyk, T.K.
    Grimes, B.H.
    Knight, R.
    Szostakowska, B.
    Kruminis-Łozowska, W.
    Racewicz, M.
    Tamang, L.
    Dasilva, A.J.
    Myjak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2147323.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Cryptosporidium parvum
    cryptosporidiosis
    mechanical transmission
    fly
    oocyst
    Opis:
    Long term field studies and laboratory experiments demonstrated that synanthropic filth flies can mechanically transmit infectious oocysts of Cryptosporidium parvum, an anthropozoonotic protozoan parasite which significantly contributes to the mortality of immunocompromised or immunosuppressed people. C. parvum oocysts are acquired from unhygienic sources, and can pass trough fly gastrointestinal track without alteration of their infectivity and can be subsequently deposited on visited surfaces. Transmission of the oocysts by adult flies occurs via: (1) mechanical dislodgement from the exoskeleton; (2) fecal deposition; and (3) regurgitation, i.e., vomits. Filth flies can cause human or animal cryptosporidiosis via deposition of infectious oocysts on the visited foodstuf, and the biology and ecology of synanthropic filth flies indicate that their potential for mechanical transmission of C. parvum is high.
    Źródło:
    Wiadomości Parazytologiczne; 2004, 50, 2; 243-247
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sensitivity analysis of multiple fault test and reliability measures in integrated GPS/INS systems
    Autorzy:
    Almagbile, A.
    Wang, J.
    Ding, W.
    Knight, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/130262.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Geodetów Polskich
    Tematy:
    GPS/INS integration
    Kalman filtering
    multiple faults
    reliability measures
    sensitivity analysis
    integracja systemów GPS/INS
    filtracja Kalmana
    uszkodzenia wielokrotne
    miary niezawodności
    analiza wrażliwościowa
    Opis:
    Based on Kalman filtering, multi-sensor navigation systems, such as the integrated GPS/INS system, are widely accepted to enhance the navigation solution for various applications. However, such integrated systems do not always provide robust and stable navigation solutions due to unmodelled measurements and system dynamic errors, such as faults that degrade the performance of Kalman filtering for such integration. Single fault detection methods based on least squares (snapshot) method were investigated extensively in the literature and found effective to detect the fault at either sensor level or integration level. However, the system might be contaminated by multiple faults simultaneously. Thus, there is an increased likelyhood that some of the faults may not be detected and identified correctly. This will degrade the accuracy of positioning. In this paper multiple fault test and reliability measures based on a snapshot method were implemented in both the measurement model and the predicted states model for use in a GPS/INS integration system. The influences of the correlation coefficients between fault test statistics on the performances of the faults test and reliability measures were also investigated. The results indicate that the multiple fault test and reliability measures can perform more effectively in the measurement model than the predicted states model due to weak geometric strength within the predicted states model.
    Źródło:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2011, 22; 25-37
    2083-2214
    2391-9477
    Pojawia się w:
    Archiwum Fotogrametrii, Kartografii i Teledetekcji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A calculation model for liquid-liquid extraction of protactinium by 2,6-dimethyl-4-heptanol
    Autorzy:
    Knight, A. W.
    Eitrheim, E. S.
    Nelson, A. W.
    Schultz, M. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/146380.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    design of experiments
    protactinium
    solvent extraction
    Opis:
    Reprocessing of spent nuclear fuel usually employs the solvent extraction technique to recover fissile material, isolate other valuable radionuclides, recover precious metals, and remove contaminants. Effi cient recovery of these species from highly radioactive solutions requires a detailed understanding of reaction conditions and metal speciation that leads to their isolation in pure forms. Due to the complex nature of these systems, identification of ideal reaction conditions for the efficient extraction of specific metals can be challenging. Thus, the development of experimental approaches that have the potential to reduce the number of experiments required to identify ideal conditions are desirable. In this study, a full-factorial experimental design was used to identify the main effects and variable interactions of three chemical parameters on the extraction of protactinium (Pa). Specifi cally we investigated the main effects of the anion concentration (NO3 –, Cl–) extractant concentration, and solution acidity on the overall extraction of protactinium by 2,6-dimethyl-4-heptanol (diisobutylcarbinol; DIBC) from both HCl and HNO3 solutions. Our results indicate that in HCl, the extraction of protactinium was dominated by the solution acidity, while in nitric acid the extraction was strongly effected by the [DIBC]. Based on our results, a mathematical model was derived, that describes the relationship between concentrations of anions, extractant, and solution acidity and the expected values of Pa distribution coefficients in both HCl and HNO3. This study demonstrates the potential to predict the distribution coefficient values, based upon a mathematical model generated by a full-factorial experimental design.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 2; 837-845
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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