Autor: Jóźwik, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Measurement of oxygen permeability of contact lenses based on analysis of porosity
Autorzy:: Lewandowska, M.
Jasińska-Kwaśnik, W.
Jóźwik, A.
Siedlecki, D.
Powiązania:: https://bibliotekanauki.pl/articles/1190018.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: przenikalność tlenu
soczewka
porowatość
oxygen permeability
contact lens
porosity
Opis:: Oxygen permeability seems to be the most important parameter characterize the contact lens. Lenses, which permeable more oxygen to the cornea are safer, reduce the risk of infection and provide greater comfort of wearing. Oxygen permeability of contact lenses might be calculated by analysis of porosity of its surface. With using special program the size and number of pores on definite area was calculated and dependence of permeability and hydration on porosity were established.
Źródło:: Interdisciplinary Journal of Engineering Sciences; 2015, 3, 1; 1--5
2300-5874
Pojawia się w:: Interdisciplinary Journal of Engineering Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A two-stage model of an arteriovenous fistula maturation process
Autorzy:: Jodko, Daniel M.
Obidowski, Damian S.
Reorowicz, Piotr
Jóźwik, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/27324149.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: hemodialysis
anastomosis
fluid structure interaction
wall shear stress
arteriovenous fistula AVF
AVF maturation
hemodializa
zespolenie
interakcja struktury płynu
naprężenie ścinające ściany
przetoka tętniczo-żylna AVF
dojrzewanie AVF
Opis:: Purpose: An arteriovenous fistula has been a widely accepted vascular access for hemodialysis, however, a fistula maturation process is still not fully understood. In the short period of time, right after vein and artery shunting, the physical and biological changes take place mainly in the venous wall. A two-stage modeling method of arteriovenous fistula maturation process was proposed and presented. Methods: The first stage of the maturation was modeled with two-way coupled fluid structure interaction computer simulations. Whereas for the second, biological stage, a model was based on the change in the elasticity of the venous wall due to wall shear stress (WSS) modifications. Results: The relation between stress and radial and circumferential strain, based on Lame’s theory, makes possible to introduce a mathematical model defining modulus of elasticity, averaged WSS, and venous diameter as time functions. The presented model enables one to predict changes in the monitored parameters in the arteriovenous fistula taking place in the time longer than 90 days. Conclusions: We found that probably the majority of fistulas can be assessed to be mature too early, when the adequate blood flow rate is achieved but mean WSS still remains at the non-physiological level (>10 Pa).
Źródło:: Acta of Bioengineering and Biomechanics; 2020, 22, 2; 139--153
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Dostawca treści:: Biblioteka Nauki

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