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  • Engineering General  (1)
  • Thin films  (1)
  • ethical cognition  (1)
  • 1
    ISSN: 1572-9605
    Schlagwort(e): Thin films ; radiation damage ; surface resistance
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Elektrotechnik, Elektronik, Nachrichtentechnik , Physik
    Notizen: Abstract We have explored the effect of 2-MeVH+ irradiation on the superconducting transport properties of thin films of YBa2Cu3O7−δ [T c, Jc(B=0; 77 K, 4.2 K), andR s(36 GHz;T)]. The inductively measured critical temperatureT c changed slowly and uniformly (∼2 K per 1016/cm2) for fluences less than ∼3×1016/cm2. Beginning at ∼3–4×1016/cm2, the superconducting transition broadened and dropped more quickly with fluence. The critical current density measured at 77 and 4.2 K changed roughly linearly with fluence. The microwaveT c (as defined by the sharp transition inR s as a function of temperature) resembled the low-frequency inductiveT c measurement at low fluences but was depressed more strongly for large fluences. The residual surface resistance (∼6–10 mΩ) was not affected for fluences up to 5×1016/cm2. We have interpreted the sudden and reproducible reduction in the microwaveT c transition as a sensitive indicator of disruption in the copper-oxygen chain sublattice and compared the proton-induced change to that observed in oxygen gettering studies of bulk materials.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1573-1944
    Schlagwort(e): ethical cognition ; principled score ; intervention ; longitudinal ; cross-sectional
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Philosophie , Wirtschaftswissenschaften
    Notizen: Abstract In this study, we present evidence on the changes inethical cognition of business students over afour-year period. We use the Principled Score(P-score) of the Defining Issues Test to measure thischange. Specifically, we first compare the P-scores ofstudents at the entry to, halfway through, and shortlyafter graduation from a business school to analyze theeffect size of education on ethical cognition.Secondly, for a sample of students in an electivebusiness ethics course, we compare P-scores at thebeginning, and at the end of the semester to analyzethe effect size of specific intervention course onethical cognition. Prior studies in liberal arts fields have reportedhigh effect sizes from four-year college education onethical cognition, while a few studies have reportedonly moderate gains for business students. Consistentwith the liberal arts studies, our results indicatestatistically significant gains, and high effect sizesfor business students as well. Similarly, priorstudies have reported moderate gains in the P-scorefrom intervention courses in various fields. Ourresults indicate only low to moderate effect sizes forbusiness students. Importantly, while the gain waslow, and statistically insignificant for femalestudents, it was moderate, and highly significant formale students. Implications for education and researchare discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 22 (1996), S. 283-296 
    ISSN: 0271-2091
    Schlagwort(e): laminar flow ; numerical modelling ; particle image velocimetry measurement ; rotating disc ; Engineering ; Engineering General
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Notizen: The fluid flow field within an enclosed cylindrical chamber with a rotating flat disc was calculated using a finite volume computational fluid dynamics (CFD) model and compared with particle image velocimetry (PIV) measurements. Two particular laminar cases near the Transitional flow regime were investigated: Reynolds number Re=2.5×1 4, chamber aspect ratio G (h/Rd)=0.2 and Re=4.2×104, G (h/Rd)=0.217. This enabled direct comparison with the numerical and experimental results reported by other researchers. The computational details and some major factors that affect the computed accuracy and convergence speed are also discussed in detail. PIV results containing some 4300 velocity vector points in each of seven planes for each case were obtained from the flow field parallel to the rotating disc. It was found that PIV results could be obtained in planes within the boundary layers as well as the core flow by careful use of a thin laser illumination sheet and correct choice of laser pulse separation. There was close agreement between numerical results, the present PIV measurements and other reported experimental and numerical results.
    Zusätzliches Material: 10 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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