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Chang-Beom Kim,Sehyun Shin,J. Yasha Kresh,David M. Wootton 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Platelet adhesion and aggregation in high shear arterial flows may depend on transient binding of platelets glycoprotein GPIb to the vascular protein von Willebrand factor, which temporarily retains passive platelets at the vessel wall or thrombus allowing for activation and stable integrin-mediated binding. Platelet adhesion also depends on rheological factors such as shear-dependent platelet dispersion and margination. A new in vitro assay was developed to simultaneously measure both near wall platelet concentration and motion in the flowing blood, and platelet transient and stable adhesion to protein-coated surfaces. Transient binding was an increasing function of shear rate. Margination, enriched platelet concentration 2 to 4 microns above the vessel wall, was observed and was an increasing function of shear rate. The experiments confirm the interaction between near-wall platelet concentration and platelet adhesion, and will be used for development of theoretical models of platelet adhesion and aggregation in shear flow of blood.
Design of Concentrating System for Solar Side-pumped Slab Laser
Wentong Fan,Yan Liu,Pan Guo,Rui Deng,Nan Li,Fukang Ding,Yasha Li,Jun Zhou,Shiwei Xie 한국광학회 2020 Current Optics and Photonics Vol.4 No.1
The design of a concentration system for a solar side-pumped slab laser was investigated. The side size of the slab laser medium is 2 mm × 20 mm. Based on the principle of the edge ray, a secondary concentrating system consisting of a rectangular parabolic mirror (RPM) and a rectangular dielectric-filled compound parabolic concentrator (RDCPC) was demonstrated. The focal length of RPM is 1200 mm and the size is 734 mm × 2000 mm. The outlet size of the RDCPC is 2 mm × 20 mm. The concentration effect was analyzed by using Tracepro optical software. The results showed that the concentration efficiency reached 81.3% and the uniformity of the spot was 91.4% after optimization. This design of concentration system is of great reference value for a solar side-pumped slab laser.
Design of Concentrating System for Solar Side-pumped Slab Laser
Fan, Wentong,Liu, Yan,Guo, Pan,Deng, Rui,Li, Nan,Ding, Fukang,Li, Yasha,Zhou, Jun,Xie, Shiwei Optical Society of Korea 2020 Current Optics and Photonics Vol.4 No.1
The design of a concentration system for a solar side-pumped slab laser was investigated. The side size of the slab laser medium is 2 mm × 20 mm. Based on the principle of the edge ray, a secondary concentrating system consisting of a rectangular parabolic mirror (RPM) and a rectangular dielectric-filled compound parabolic concentrator (RDCPC) was demonstrated. The focal length of RPM is 1200 mm and the size is 734 mm × 2000 mm. The outlet size of the RDCPC is 2 mm × 20 mm. The concentration effect was analyzed by using Tracepro optical software. The results showed that the concentration efficiency reached 81.3% and the uniformity of the spot was 91.4% after optimization. This design of concentration system is of great reference value for a solar side-pumped slab laser.