Autor: Noble, C. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The Scattering of Positrons and Positronium by Atoms in the Close-Coupling Approximation
Autorzy:: Hewitt, R. N.
Noble, C. J.
Bransdfen, B. H.
Powiązania:: https://bibliotekanauki.pl/articles/1933490.pdf
Data publikacji:: 1995-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 36.10.-k
34.70.+e
Opis:: We present some recent results obtained within the close-coupling approximation for both positron and positronium scattering by atoms. We begin by discussing a generalization of the method of Vincent and Phatak to study the formation of Ps- in Ps collisions with H(1s) in a simplified model. The important result of this calculation is that the overall Coulomb interaction which is present in the rearrangement channel is treated exactly. We also present results for positronium formation and ionization for positron scattering by argon atoms. The present calculations are for transitions from the Αr(3s$\text{}^{2}$) subshell and show the importance of the coupling to the continuum.
Źródło:: Acta Physica Polonica A; 1995, 88, 1; 139-145
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A simple method of incorporating the effect of the Uniform Stress Hypothesis in arterial wall stress computations
Autorzy:: Joldes, G. R.
Noble, C.
Polzer, S.
Taylor, Z. A.
Wittek, A.
Miller, K.
Powiązania:: https://bibliotekanauki.pl/articles/306753.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: naprężenia własne
metoda elementów skończonych
ściana tętnicy
Uniform Stress Hypothesis
residual stress
finite element method
arterial wall stress
Opis:: Residual stress has a great influence on the mechanical behaviour of arterial wall. Numerous research groups used the Uniform Stress Hypothesis to allow the inclusion of the effects of residual stress when computing stress distributions in the arterial wall. Nevertheless, the available methods used for this purpose are very expensive, due to their iterative nature. In this paper we present a new method for including the effects of residual stress on the computed stress distribution in the arterial wall. Methods: The new method using the Uniform Stress Hypothesis enables computing the effect of residual stress by averaging stresses across the thickness of the arterial wall. Results: Being a post-processing method for the computed stress distributions, the proposed method is computationally inexpensive and, thus, better suited for clinical applications than the previously used ones. Conclusions: The resulting stress distributions and values obtained using the proposed method based on the Uniform Stress Hypothesis are very close to the ones returned by an existing iterative method.
Źródło:: Acta of Bioengineering and Biomechanics; 2018, 20, 3; 59-67
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

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