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손성완,서정원,신승주,정성근,Sung Wan Son,Jung Won Seo,Seong Joo Shin,Sung Kun Chung 대한안과학회 2010 대한안과학회지 Vol.51 No.12
Purpose: The goal of the present study was to compare the stability of the 3-piece (TecnisⓇ ZA9003) and single-piece (AcrySofⓇ IQ) aspheric intraocular lenses (IOL) by testing decentration, tilt, anterior chamber depth, and refraction. Methods: The subjects of this study consisted of 101 eyes who had undergone cataract surgeries with a 3-piece aspheric IOL (54 eyes) and with a single-piece aspheric IOL (47 eyes). The decentration, tilt, anterior chamber depth, and refraction were measured on postoperative day 1, 1 month, and 2 months, using an anterior eye segment analysis system (EAS-1000, Nidek, Japan). Results: There was a statistically significant difference in the decentration on the postoperative day 1 (p = 0.04). However, there was no statistically significant difference on postoperative 1 month (p = 0.15) and 2 months (p = 0.13). There was no statistically significant difference in the tilt on postoperative day 1, 1 month, and 2 months. There was no statistically significant difference in the anterior chamber depth on postoperative day 1, 1 month, and 2 months. There was a statistically significant difference in the refraction on postoperative day 1 (p = 0.03). However, there was no statistically significant difference on postoperative 1 month (p = 0.07) and 2 months (p = 0.07). Conclusions: There was no statistically significant difference in the decentration, anterior chamber depth, and refraction between the 3-piece and single-piece aspheric IOL. Therefore, there is no difference between the 3-piece and single-piece aspheric IOL in the capsular bag stability until 2 months postoperatively. J Korean Ophthalmol Soc 2010;51(12):1584-1589
식품 중 잔류농약 안전관리를 위한 농약 허용물질목록 관리제도 도입
손성완 ( Seong Wan Son ),김진숙 ( Jin-sook Kim ),권찬혁 ( Chan-hyeok Kwon ),김효진 ( Hyochin Kim ) 한국환경농학회 2016 한국환경농학회 학술대회집 Vol.2016 No.-
With a growing global population expected to reach over 9 billion in 2050 and the increasing impact of climate change, developing sustainable agriculture and aquaculture while at the same time ensuring food safety presents great challenges. Not only does it require a better understanding of how terrestrial and aquatic ecosystems function and their interrelationship with the availability of quality water, it requires a shift in the way we managethe ecosystems and the water within them to ensure food security. We have to safeguard and use our ecosystems wisely as they provide the basis of all the environmental services needed to achieve food security which are particularly important for the poor, women, and marginal groups. Agricultural and aquaculture production systems have to be recognized and managed as a landscape of integrated agro ecosystems with the potential for multiple functions. This presentation will review and examine the complexities involved in our ability to grow food sustainably in the midst of the degradation of the ecosystem services and examine the role policy makers can play in encouraging producers to retain or adopt more susceptible farming practices while safeguarding the benefits for local, national and global populations.
사각 밀폐계 내 자연대류에 의한 원형 실린더의 운동 특성에 관한 수치적 연구
손성완(Seong Wan Son),정해권(Hea Kown Jeong),하만영(Man Yeong Ha),윤현식(Hyun Sik Yoon) 대한설비공학회 2010 설비공학 논문집 Vol.22 No.11
The present study numerically investigates the motion of a solid body suspended in the square enclosure with natural convection. A two-dimensional circular cylinder levitated thermally has been simulated by using thermal lattice Boltzmann method(TLBM) with the directforcing immersed boundary method. To deal with the ascending, falling or levitation of a circular cylinder in natural convection, the immersed boundary method is expanded and coupled with the TLBM. The circular cylinder is located at the bottom of a square enclosure with no restriction on the motion and freely migrates due to the Boussinesq approximation which is employed for the coupling between the flow and temperature fields. For different density ratio between the cylinder and the fluid, the motion characteristics of the circular cylinder for various Grashof numbers have been carried out. The Prandtl number is fixed as 0.7.