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반창우,홍석기,장동영 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-
반도체, LCD, 휴대폰과 같이 제품 원가에 비해 고부가가치 제품 산업들은 급속한 발전과 새로운 서비스 요구로 인해 제품의 생산에 있어서 제조 스피드가 관건이다. 본 연구에서는 복잡하고 다양한 반도체 프로세스 중에서 Track - Aligner - Oxide Etcher - Asher - Sputter - Microscope 프로세스의 모델링을 통하여 평균 생산 시간과 처리량을 측정하여 처리량을 극대화 할 수 있는 생산 시간의 최적화에 대해 고찰하였다.
서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)
김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1
In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.
Laminate Veneer용 도재의 표면처리가 치질과의 결합강도에 미치는 영향
반용석,정현곤,홍순호 慶北大學校 齒科大學 1991 慶北齒大論文集 Vol.8 No.1
The Purpose of this study was to evaluate the effect of the shear bond strength between porcelain laminate veneer and enamel according to the surface treatment and thermocycling. Group Ⅰ, as a control group, was sandblasted only; group Ⅱ was sandblasted and etched; group Ⅲ was snadblasted and silane treated; and group Ⅳ was sandblasted, etched and silane treated. A porcelain block was placed onto the etched enamel under a 150g static load and the bonded site was light-cured from 4 directions for 1 minute each. The 72 bonded specimens were stored in water at 37℃ for 1 day. Half of each group were themocycled at 4℃ and 60℃ for 100 cycles with a dwelling time in each bath of 1 min. Following thermocycling, the specimens were installed in an Instron universal testing machine and the shear bond strength was measured. After the specimens were fractured, the fractured surfaces were examined with SEM. The obtained results were as follows; 1. The shear bond strength of the sandblasted and etched and silane treated group(Group Ⅳ) was the strongest of all, and the shear bond strengths between the snadblasted group (Group Ⅰ) and the sandblasted and silane treated group (Group Ⅲ) were not statistically different(p>0.05). 2. When the shear bond strength was measured after thermocycling, only the sandblasted, etched and silane treated group (Group Ⅳ) was statistically different (p<0.05). 3. The scanning electron microscopic views of the fractured surfaces show more irregularities and more resin fragments in the etched group than in the unetched group. 4. The scanning electron microscopic views of the fractured surfaces show a more delicate surface after thermocycling and after silane treatment than before thermocycling and before silane treatment. J. Kyungpook Nat. Univ Sch. Dent Vol.8, No.1, 141∼153, 1991.
김홍남,윤수진,한신,김소연,반금진,시석,박병익,이권전 대한내분비학회 1998 Endocrinology and metabolism Vol.13 No.2
The occurrences of thyrotoxicosis in patients with myasthenia gravis have been reported before the knowledge of the pathogenesis of the two disease. Thytotoxicosis is known to occur in 3 to 6 percent of patients with myasthenia gravis and myasthenia gravis occurs in only a fraction of 1 percent of the thyrotoxic populatian. Myasthenia gravis is currently considered as a systemic autoimmune disorder of acetylcholine receptor and often presented with other autoimmune diseases such as SLE, Rheumatoid arthritis. We experienced a 18-year-old woman who presented with graves disease and isolated ocular myasthenia gravis. Chest CT didnot reveal enlarged thymus. The usual treatement of myasthenia gravis associated with thymtoxicosis consists of medical control of the thyrotoxicosis, then thymectomy and later subtotal thyroidectomy. Her ptosis and thyrotoxicosis have improved after the medicatian of anticholinesterase and propylthiourecil. A case of ocular myasthenia gravis with Gravesdisease was experienced, so we reported the case with a brief review of literature (J Kor Soc Endocrinol 13:252-257, 1998).
반창우(Chang-Woo Ban),홍석기(Seok-Kee Hong),장동영(Dong-Young Jang) 한국생산제조학회 2008 한국생산제조시스템학회 학술발표대회 논문집 Vol.2008 No.10
반도체, LCD, 휴대폰과 같이 제품 원가에 비해 고부가가치 제품 산업들은 급속한 발전과 새로운 서비스 요구로 인해 제품의 생산에 있어서 제조 스피드가 관건이다. 본 연구에서는 복잡하고 다양한 반도체 프로세스 중에서 Track - Aligner - Oxide Etcher - Asher - Sputter - Microscope 프로세스의 모델링을 통하여 평균 생산 시간과 처리량을 측정하여 처리량을 극대화 할 수 있는 생산 시간의 최적화에 대해 고찰하였다.
한강수계 유량곡선식 개발 및 수질오염물질 항목간 상관성 분석에 관한 연구 -벽계천 중심으로-
홍성호 ( Sung Ho Hong ),반종석 ( Jong Seok Ban ),전항배 ( Hang Bae Jun ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.3
We drew the stage-discharge relations of Byeokgye Stream, located in Yangpyeong-gun, Gyeonggi-do, and analysed the correlation between items of water pollutants by measuring the flow rate and water pollutants thirty-four times from April 2010 to December 2010. The results showed that it tended to be low water season from April to June and from October and December, while tending to be water season from July to September. The average flow rate was 2.137 m3/sec: 0.464 m3/sec in low water season and 13.970 m3/sec in high water season. The stage-discharge curve thereon was . As to the correlations, the correlation between the water temperature and COD was 0.58, and the correlations of SS with BOD and COD were 0.46 and 0.40 respectively. The correlation between SS and T-P was 0.73, showing higher than other items.