http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
기포탑내에서 부유물 첨가에 의한 기체체류량과 물질전달계수에 관한 연구
최일곤,한승완,하종열,김상렬 東亞大學校 大學院 1994 大學院論文集 Vol.19 No.-
Gas holdup and volumeteric liquid phase mass transfer coefficient in a bubble column with granular activated carbon were measured according to partcle size and concentration of granular activated carbon and gas velocity. The results of the experiments were as follows ; 1. Gas holdup and volumetric liquid phase mass transfer coefficient increase with increasing the gas velocity. 2. Gas holdup has no effect on concentration of granular activated carbon, but volumetric liquid phase mass transfer coefficient decrease with increasing the concentration. 3. Gas holdup increase with being enlarged particle size of granular activated carbon, but volumetric liquid phase mass transfer cofficient decrease. 4. Correlations among various parameters having an influence on Gas holdup and volumetric liquid phase mass transfer coeffient were expressed by Eq.(9) and Eq.(10) respectively.
건조기에서 Amino수지 성형재료의 경화특성에 관한 연구
최재욱,최일곤,목연수,김상렬 釜慶大學校 1998 釜慶大學校 論文集 Vol.3 No.2
We studied the effect of mass transfer in a dryer on the condensation of amino resin mould material and the curing characteristics, and investigated the drying rate, the moisture and the curing fluidity according th the variations of the temperature and the drying media recycle volume which affects the mass transfer in the drying process. So, the result are summarized as follows: ① As the drying temperature increased to 70℃, 80℃ and 90℃ respectively, the drying rate became fast. ② In the same final drying time, the higher the drying temperature became, the more the moisture content of the urea resin mould material inceased. ③ Accordingly as the drying temperature increased, the moisture content of the drying material suddenly decreased in short drying time, but the moisture content increased when the drying time was between 80 minute and 120 minutes. ④ As the drying temperature increased, the curing fluidity of amino resin mould meterial decreased. ⑤ As the recycle volume of the drying media increased, the curing fluidity decreased.
이중관 기포탑에서 점성수용액의 기-액간 물질전달에 관한 연구
최일곤,김상렬 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
The gas holdup and volumeteric liquid phase mass transfer coefficient with the variation of the concentration of CMC aqueous solution, gas velocity, diameter ratio of the draught tube were investigated. As the results of the experiments, the gas holdup and volumetric liquid phase mass transfer coefficient decreased with increasing the concentration of CMC aqueous solution, increased with increasing the gas holdup and decreased with increasing the gas velocity the volumeteric liquid phase mass transfer coefficient the diameter ratio of the draught tube, correlations amang various parameters having an influence on gas holdup and volumeteric liquid phase mass transfer coefficient.
관절원판 유착을 동반한 악관절 내장증 환자의 수술후 증상의 변화
김형곤,남광현,박광호,허종기,김일수,최희수 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.3
Purpose: The aim of this study was to find the clinical characteristics of the patients who had temporo-mandibular joint internal derangement(ID) with disc adhesion(adhesion group) compared to only disc displacement without disc adhesion, perforation, hyperemia, and so on(ID group) . Materials and methods: Thirty seven joints were included in adhesion group and 54 joints in ID group of all 174 patients(174 joints) treated surgically and had been checked periodically over 12 months at TMJ clinic of Yongdong Severance Hospital, Yonsei University, between 1992 and 1997. Mouth opening range, pain during mouth opening and biting, headache, neck/shoulder pain and TMJ sound were checked his/her every visit before and after surgery. Results: The maximum mouth opening was improved significantly after postoperative 3 months in two groups(p<0.01), but adhesion group was less improved. Pain during mouth opening was improved significantly over 3 months after surgery in adhesion group(p<0.01), but in ID group 1 month after surgery. Biting pain was improved and maintained it after surgery and not significant difference between two groups. Headache and neck/shoulder pain were much improved after surgery(p<0.01) , but slight relapse was found in adhesion group after 12 months. TMJ sound was more found in adhesion group after 1 month(p<0.05), but after 3 months, no significant difference was found between two groups. Conclusions: The postoperative results of adhesion group were worse than ID group. Therefore, it is considered more carefully to diagnose and treat in cases of internal derangement with adhesion.
한승완,최일곤,김상렬 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.1
The effect of gas houdup and volumetric liquid-phase mass transfer coeffecient in the bubble coplumn with multiple draft tube were investigated experimentally, according to gas velocity, plate interval and the diameter and plate number of draft tube at 298±0.5K. The gas holdup and volumtric liquid-phase mass transfer coeffecient increased with decreasing the interval of draft tube when the diameter ratio of draft was small but decreased when the diameter ratio of draft tube was large. Also based on these observations, correlation equations of gas holdup and volumetric liquid phase mass transfer coefficients were proposed.
한승환,김상렬,최재욱,최일곤 東亞大學校 1991 東亞論叢 Vol.28 No.1
The effect of draught tube dimension, properties of CMC aqueous solution and gas velocity on the gas holdup, ??, and the volumetric liquidphase masstransfer coefficient, ??, in a bubble column with draught tube were measured in highly viscous-pseudo plastic carboxymethylcellulose aqueous solution. The results were as follows : 1. ?? and ?? increase with increasing gas velocity and decrease with increasing concentration of CMC aqueous solution. 2. ?? and ?? increase with being enlarged diameter ratio of draught tube but specially ?? decreases to some degree in the CMC concentration of 0.05∼0.7wt%. 3. Correlations among various parameters having an influence on ?? and ?? were expressed by Eq. (16) and Eq. (17), respectively. ??
윤영웅,김상렬,최일곤,한승완 東亞大學校 1992 東亞論叢 Vol.29 No.1
비뉴튼류인 CMC수용액중의 기체체류량과 용량액상물질전달계수를 분산판 구멍의 면적비와 용액의 물성에 따라 실험하였다. ε??와 K??a의 값은 CMC의 농도가 증가할 수록 감소하나 구멍의 수가 3∼8개 범위에서는 분산판의 구멍 면적비에 거의 영향이 없었다. 실험에 의하여 column에 적용될 수 있는 ε??와 K??a에 대한 식을 제안 하였다. The effect of properties of CMC-solution and area ratio of distributor hole on gas holdup and volu-metric liquid-phase mass transfer coefficient in a bubble column have been experimentally studied. The values of ε?? and K??a were decreased with increasing concentration of CMC and were scarcely affected by the area ratio of distributor in the range of the 3∼8 hole number. Correlations for ε?? and K??a were formulated from the experimental result.
Interregional synaptic maps among engram cells underlie memory formation
Choi, Jun-Hyeok,Sim, Su-Eon,Kim, Ji-il,Choi, Dong Il,Oh, Jihae,Ye, Sanghyun,Lee, Jaehyun,Kim, TaeHyun,Ko, Hyoung-Gon,Lim, Chae-Seok,Kaang, Bong-Kiun American Association for the Advancement of Scienc 2018 Science Vol.360 No.6387
<P>Memory resides in engram cells distributed across the brain. However, the site-specific substrate within these engram cells remains theoretical, even though it is generally accepted that synaptic plasticity encodes memories. We developed the dual-eGRASP (green fluorescent protein reconstitution across synaptic partners) technique to examine synapses between engram cells to identify the specific neuronal site for memory storage. We found an increased number and size of spines on CA1 engram cells receiving input from CA3 engram cells. In contextual fear conditioning, this enhanced connectivity between engram cells encoded memory strength. CA3 engram to CA1 engram projections strongly occluded long-term potentiation. These results indicate that enhanced structural and functional connectivity between engram cells across two directly connected brain regions forms the synaptic correlate for memory formation.</P>