79,820 research outputs found
Inertial convection in rotating fluid spheres
No full textThe onset of convection in the form of inertial waves in a rotating fluid sphere is studied through a perturbation analysis in an extension of earlier work by Zhang (1994). Explicit expressions for the dependence of the Rayleigh number on the azimuthal wavenumber are derived and new results for the case of a nearly thermally insulating boundary are obtained
Do non-formal and informal adult education affect citizens’ political participation during adulthood?
No full textPurpose: While research on political participation hardly takes into account the effects of non-formal or informal education, the effects of formal education are well investigated. The aim of this paper is to determine the extent to which non-formal and informal education contribute to adults’ participation in different political activities when formal educational background and other socioeconomic factors are controlled.
Method: This paper uses data from the German National Educational Panel Study (NEPS, N=9,084). Binomial logistic regressions are used for the analyses, and average marginal effects (AMEs) are used for the model’s output.
Findings: The findings reveal that non-formal and informal adult education significantly affect different political activities. However, the effects of non-formal and informal adult education differ with regard to the different forms of political participation. The results underline the importance of differentiated analyses of political participation and non-formal and informal adult education. In addition, the results show that some types of non-formal and informal education have a greater impact on adults of low socioeconomic status.
Research limitations: This paper cannot account for self-selection effects because adults’ participation in different political activities was collected only in one wave
Dimensionen politischer Partizipation und ihr Zusammenhang mit unterschiedlichen Bildungsphasen
No full textBonusmeilen im miles and more Programm der Lufthansa
No full textBusse J. Bonusmeilen im miles and more Programm der Lufthansa. r+s 2023, 503. 2023
Pandemie als Ausschluss in Reiseversicherungsprodukten (gemeinsam mit Ansgar Staudinger)
No full textBusse J. Pandemie als Ausschluss in Reiseversicherungsprodukten (gemeinsam mit Ansgar Staudinger). r+s 2021, 66. 2021
Die Klausel der unerwarteten schweren Erkrankung in Reiseversicherungsprodukten
No full textBusse J. Die Klausel der unerwarteten schweren Erkrankung in Reiseversicherungsprodukten. r+s 2023, 385. 2023
Fowler´s Modern English Usage at the Interface of Lexis and Grammar
No full textSchröder A, Busse U. Fowler´s Modern English Usage at the Interface of Lexis and Grammar. In: Römer U, Schulze R, eds. Exploring the Lexis - Grammar Interface. Studies in Corpus Linguistics. Vol 35. Amsterdam: Benjamins; 2009: 69-87
Prandtl-number dependence of convection-driven dynamos in rotating spherical fluid shells
No full textThe value of the Prandtl number P exerts a strong influence on convection-driven dynamos in rotating spherical shells filled with electrically conducting fluids. Low Prandtl numbers promote dynamo action through the shear provided by differential rotation, while the generation of magnetic fields is more difficult to sustain in high-Prandtl-number fluids where higher values of the magnetic Prandtl number Pm are required. The magnetostrophic approximation often used in dynamo theory appears to be valid only for relatively high values of P and Pm. Dynamos with a minimum value of Pm seem to be most readily realizable in the presence of convection columns at moderately low values of P. The structure of the magnetic field varies strongly with P in that dynamos with a strong axial dipole field are found for high values of P while the energy of this component is exceeded by that of the axisymmetric toroidal field and by that of the non-axisymmetric components at low values of P. Some conclusions are discussed in relation to the problem of the generation of planetary magnetic fields by motions in their electrically conducting liquid cores
Withdrawal of statins leads to an attenuation of endothelial function and an increase in redox-mediated signalling and gene expression
No full textModel based defect characterization in composites
No full textWork is reported on model-based defect characterization in CFRP composites. The work utilizes computational models of the interaction of NDE probing energy fields (ultrasound and thermography), to determine 1) the measured signal dependence on material and defect properties (forward problem), and 2) an assessment of performance-critical defect properties from analysis of measured NDE signals (inverse problem). Work is reported on model implementation for inspection of CFRP laminates containing multi-ply impact-induced delamination, with application in this paper focusing on ultrasound. A companion paper in these proceedings summarizes corresponding activity in thermography. Inversion of ultrasound data is demonstrated showing the quantitative extraction of damage properties.This proceeding may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.
This proceeding appeared in Roberts, R., and S. Holland. "Model based defect characterization in composites." In AIP Conference Proceedings, vol. 1806, no. 1, p. 090015. AIP Publishing LLC, 2017, and may be found at
DOI: 10.1063/1.4974659.
Copyright 2017 Author(s).
Posted with permission
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