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초임계 이산화탄소를 이용하는 친환경 공정에 의한 다공성 고분자의 제조
강세란,홍성수,이민규,이석희,천재기,주창식 한국환경과학회 2004 한국환경과학회지 Vol.13 No.3
An experimental study on the preparation of monolithic porous polymers by environmentally friend process in supercritical carbon dioxide has been carried out. Polymerization mixture composed of a cross-linking monomer, initiator and functional co-polymer was charged in the reactor with sapphire window. After the system was purged with a flow of CO₂ for 15 min, the reactor was pressurized with liquid CO₂ up to 100 bars. The reactor was isolated from and placed back to the system via quick connector for shaking until the mixture had become fully homogeneous. The reactor was then heated and pressurized to the required reaction conditions and left overnight. After cooling and CO₂ evacuation, the polymer was removed from the reactor as dry, white, continuous monoliths. The effect of experimental conditions on the physical properties of porous polymer was systematically examined, and it was found that monomer content had a major effect on the physical properties of the polymers.
중소기업에서의 품질/환경 통합경영시스템 구축 사례 연구
강민석,장원철,박병춘 한국품질경영학회 2003 품질경영학회지 Vol.31 No.1
This study deals with a case analysis on the implementation of ISO 9000/14000 Integrated Management System. The intention is to provide some general guidelines, in particluar, to small-to-medium-sized companies that are planning to introduce the Integrated Management System. First we briefly review each of the ISO 9000 series, ISO 14000 series and Integrated Management System. We then investigate the case of a small-sized company that have built and is successfully operating the Integrated Management System. We start with introducing the company, and then examine the background and the procedure for implementing the Integrated Management System. We investigate effects of the Integrated Management System, which are the main focus of this paper. This study is meaningful in that, to our best knowledge, it is the first field report appearing in the literature in regard to the actual implementation of ISO 9000/14000 Integrated Management System in Korea.
강민수,김형석,박승조 동아대학교 환경문제연구소 1995 硏究報告 Vol.18 No.1
This study was on the removal of phosphorus compounds in domestic and synthetic wastewater using iron-anode electrolytic reactor. The experiments were performed at different current, reaction time and flow rate. The results are as follows ; 1. For the synthetic wastewater with the flow rate of 1.5 ℓ/min and 0.75 ℓ /min, the removal efficiencies were 97% and 98%, respectively. The order conditions of this continuous experiments are current density 2.54 A/dm² and reaction time 20 minutes. 2. The optimal conditions of the batch experiment for synthetic wastewater were current density 0.95 A/dm² and reaction time 3.0 minutes with no addition of electrolyte. With electrolyte, the optimal conditions were current density 2.54 A/dm² and reaction time 1.0 minutes. For the both experiments, the removal efficiencies were far over 97%.
建築物에 있어 太陽電池의 태양광 추적기법 適用 가능성에 관한 實驗的 硏究
강성범,오민석,김회서 대한건축학회 2003 대한건축학회논문집 Vol.19 No.9
The amount of electric power produced by Photovoltaic(PV) depends on the density of daylight incident. In addition to the development of high efficient PV, a study on the methods for maximizing the density of daylight incident to PV surface is essential to increase the production of electric power. In this respect, many studies on light tracking and gathering device have been conducted in the advanced countries such as U.S. and Japan. However, those studies in Korea are still in an early stage. Therefore this study aims to present the optimal tracking system for the application of PV to buildings considering domestic weather condition. In this study, the tracking type, the interval of tracking offset and optimum integration of tracking system were investigated.
주요우울증에 대한 Milnacipran의 효과 및 안정성 : Fluoxetine과의 비교
이민수,함병주,기백석,김정범,연병길,오강섭,오병훈,이철,정한용,지익성,최병무,백인호 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4
Objectives : This 6-week, open label randomized, multicenter study was conducted to evaluate the antidepressant effect and safety of milnacipran and fluoxetine in patients with major depression. Methods : The study was done in patients with major depression diagnosed by DSM-IV who score ≥17 in 17 items Hamilton Rating Scale for Depression (17-item HAM-D) and score ≥25 in Montgomery and Asberg Depression Rating Scale (MADRS). A total of 87 patients were randomized to milnacipran group and fluoxetine group. In cases of the patients taking other antidepressants, 6 weeks of each medication was administered after 7 days of drug excretion period. The evaluation was done using 17 item HAM-D, MADRS, Clinical Global Impression Scale (CGI), and COVI scale after baseline, 1 week, 2 weeks, 4 weeks, and 6 weeks. The side effects that had occurred during the period of our study were put in records by developed/disappeared time, severities, incidences, managements and results. Results : A total of 87 patients were enrolled. 70 (mitnacipran group 39 ; fluoxetine group 31) of them were included for the 6 weeks of research and 17 of them dropped out with in the first week, not due to adverse reactions or deficiency of effects. Total 17 item HAM-D scores, total points of MADRS, and CGI showed significant decrease after 1 week in each treatment group and continued decrease after 2 weeks and 4, 6 weeks. But there was no difference between milnacipran group and fluoxetine group in the antidepressant effect. There were no significant changes in vital sign, CBC, chemistry, and EKG in each treatment group. The commonly reported side elfects of minlacipran were nausea (25.0%), headache (10.7%), vomiting (7.1%),constipation (7.1%), dizziness (7.1%) and those of fluoxetne were GI trouble (11.1%), diarrhea (11.1%), insomnia (11.1%),agitation (5.6%), and dizziness (5.6%). Conclusion : Milnacipran was effective for the improvement of depressive symptoms and was well tolerated and safe in patients with depression.
이석렬,손민수,강재희,박호철 대한혈관외과학회 2002 Vascular Specialist International Vol.18 No.1
Renal artery aneurysms are rare, in less than 1% consecutive abdominal aortograms. Renal artery aneurysms are bilateral in about 10% of cases. Controversy persists regarding the indications for repair of renal artery aneurysms and optimal method of repair. The authors report a case of renal artery aneurysm with right renal atrophy in a 37-year-old male patient. This patient has no past medical history including hypertension. On physical examination, a pulsatile mass was palpated in left upper abdomen. Preoperative abdominal CT showed right renal atrophy and 8 cm diameter left renal aneurysm. Abdominal aortogram and left renal angiogram showed huge lobulated outpouching contrast collection at the proximal left renal artery without definite neck and diffuse irregularity at the proximal left renal artery. This patient was treated by splenectomy, thrombectomy, aneurysm resection and end to end splenorenal bypass. No remarkable postoperative complication was observed. The patient was doscjarged postoperative 12 days.