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무결정결함영역을 유지하면서 에너지를 절감하는 초크랄스키 실리콘 단결정 성장로 수냉관 최적 설계
채강호(Kang Ho Chae),조나영(Na Yeong Cho),조민제(Min Je Cho),정현준(Hyeon Jun Jung),정재학(Jae Hak Jung),성수환(Su Whan Sung),육영진(Young Jin Yook) 한국태양광발전학회 2018 Current Photovoltaic Research Vol.6 No.2
Recently solar cell industry needs the optimal design of Czochralski process for low cost high quality silicon mono crystalline ingot. Because market needs both high efficient solar cell and similar cost with multi-crystalline Si ingot. For cost reduction in Czochralski process, first of all energy reduction should be completed because Czochralski process is high energy consumption process. For this purpose we studied optimal water-cooling tube design and simultaneously we also check the quality of ingot with Von mises stress and V(pull speed of ingot)/G(temperature gradient to the crystallization) values. At this research we used CG-Sim<SUP>Ⓡ</SUP> S/W package and finally we got improved water-cooling tube design than normally used process in present industry. The optimal water-cooling tube length should be 200mm. The result will be adopted at real industry.
운동강도가 성장기 Sprague-Dawley 쥐의 체지방과 지방세포에 미치는 영향
채홍원,강호율,장용수 대한비만학회 1999 The Korean journal of obesity Vol.8 No.2
It is well recognized that exercise training induces the changes of %body fat (%BF) and the fat cell proliferation (FCP) in growing animal and human, but the role of training intensity in the %BF and FCP was not intensively investigated. Thus, the effects of high (HT; n=9) and low (LT; n=9) exercise training intensity with the same training volume were examined on %BF and FCP in growing male rats. Sedentary (CON; n=10) male rats were used as controls. After 8-weeks exercise training, the carcass was ground by using the blender, and then %BF was measured by the lipid extraction technique of Folchs method. Total body water and Fat-free dry mass was determined. The fat cell proliferation was evaluated from total cell number of retroperitoneal fat pad. -------------------------------------------------- (n) CON LT HT (10) (9) (9) -------------------------------------------------- % BF 13.78+1.03 4.44+0.35* 5.65+0.80* % FFM 5.42+0.58 1.42+0.12* 1.86+0.28* % H2O 61.36+1.22 67.94+1.28* 67.53+0.51* Total cell 7593*10(3) 5019*10(3) 4359*10(3) number +650*10(3) +646*10(3)* +569*10(3)* in retro fat pad -------------------------------------------------- Values are means +SE. *: Significantly different from CON. Our results indicated that training intensities did not affect %BF and FCP of growing male rats unlike the volume of exercise training.