Contact-induced change in status planning: a case study of Zhuang Putonghua
In: International journal of the sociology of language: IJSL, Band 2012, Heft 215
ISSN: 1613-3668
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In: International journal of the sociology of language: IJSL, Band 2012, Heft 215
ISSN: 1613-3668
In: Contemporary Accounting Research, Forthcoming
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In: Singapore Management University School of Accountancy Research Paper No. 2023-165
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Working paper
In: Rotman School of Management Working Paper No. 3105847
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In: Forthcoming (with online appendix), Journal of Accounting and Economics
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In: Forthcoming, Journal of Accounting, Auditing &; Finance
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In: Accounting Review, Band 89, Heft 5
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In: Review of Accounting Studies, Forthcoming
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In: Singapore Management University School of Accountancy Research Paper No. 2022-149
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In: Defence Technology, Band 10, Heft 4, S. 354-359
ISSN: 2214-9147
In: IEEE antennas & propagation magazine, Band 57, Heft 2, S. 261-266
ISSN: 1558-4143
In: Journal of neurological surgery. Part A, Central European neurosurgery = Zentralblatt für Neurochirurgie, Band 79, Heft 2, S. 108-115
ISSN: 2193-6323
Background and Study Aims Both high and low wall shear stress (WSS) play important roles in the development and rupture of intracranial aneurysms (IAs). This study aimed to determine the morphological factors that affect WSS in the IA and the parent artery.
Material and Methods We studied a total of 66 IAs with three-dimensional imaging. Computational fluid dynamics (CFD) models were constructed and used to characterize the hemodynamics quantitatively. Aneurysms were grouped according to the mean neck width. The associations among hemodynamics and morphology were analyzed.
Results Aspect ratio was correlated to lowest WSS (r = − 0.576), aneurysm-to-parent vessel (A-P) WSS ratio (r = − 0.500), and lowest-parent vessel (L-P) WSS ratio (r = − 0.575). Height-to-width ratio and height were correlated to WSS. Mean aneurysm WSS (p = 0.023), lowest WSS (p < 0.0001), highest-to-lowest WSS ratio (p = 0.004), L-P WSS ratio (p < 0.0001), highest-parent vessel (H-P) WSS ratio (p = 0.008), A-P WSS ratio (p < 0.001), and height (p < 0.001) were different between the two groups of aneurysms that were divided by the relationship between the diameters of the aneurysms and the necks. Multivariable analysis showed that the lowest WSS (p = 0.028) and A-P WSS ratio (p = 0.001) were independently associated with neck width.
Conclusion Morphological characteristics are associated with IA and parent vessel WSS. Aneurysms with different neck widths have different hemodynamics. These results could help in understanding the progression of IA and in building predictive models for IA rupture.