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실리카 피착이 철립말의 입자형태 및 자기특성에 미치는 영향 (제1보)
오재희,김종식,류병환 한국세라믹학회 1985 한국세라믹학회지 Vol.22 No.6
The properties of magnetic recording materials largely depend on their shape magnetic anisotropy. The control of their shape and size distribution is very important for improving magnetic properties. The silica-coated goethite$(SiO_2$/$\alpha$-FeOOH=1.5wt%) having acicular shape was prepared. The sillica-coated goethite was heat-treated at 40$0^{\circ}C$~1,00$0^{\circ}C$ 1hr and then reduced at 50$0^{\circ}C$ 2hr. When the silica-coated goethite was heat-treated at 80$0^{\circ}C$ its acicular shape was maintained and its magnetic properties were improved(Hc: 1,325 Oe $\sigma$m:138.8 emu/g, Rs:0.56) However the acicular shape of the paricles was broken for non-coated hematite obtained by dehydration at 80$0^{\circ}C$ They were sintered and showed poor magnetic properties.
실리카 피착이 철분말의 입자형태 및 자기특성에 미치는 영향(제2보)
오재희,김종식,류병환 한국세라믹학회 1986 한국세라믹학회지 Vol.23 No.2
The effect of dehydration temperature on the reduction process of silica-coated hematite was invest-igated The particle shape and magnetic properties of the products reduced from hematite at various conditions and the oxidation resistance of silica-coated iron powder were examined. It was revealed that single phase iron powder obtained over 45$0^{\circ}C$ had good magnetic properties. The iron powder manufactured between 45$0^{\circ}C$ and 50$0^{\circ}C$ displayed the maximum coercive force as a result of maintaining its acicular shaped. However the coercive force of iron powder reduced over 50$0^{\circ}C$ was decreased. The oxidation resistance of silica-coated iron powder in air was very good up to 11$0^{\circ}C$ and for 12 days.
기관지 천식 환자에서 발생한 자발성 기종격동 : 2례 보고
오재희 朝鮮大學校 附設 醫學硏究所 1989 The Medical Journal of Chosun University Vol.14 No.1
Air may enter the mediastinum via Lhe deep fascial planes of the neck or rarely by dissection front the retropsritoneal space or by transit through a patent foramen from the peritoneal cavity, Pneumomediastinum also results from perforation of the trachea, or bronchi or esophagus and as a sequela of interstitial emphysema. The lattsr condition, sometimes referred to as "spontaneous pneumomediastmum" is the results of alveolar wall rupture secondary to high intraalveolar pressure caused by artificial ventilation, cough, straining etc. I have experienced 2 cases of spaniansous pneumoinediastinum associated with acute asthmatic attack recently, so I report the cases briefly with a review.
오재희 釜山外國語大學 國際問題硏究所 1997 國際問題論叢 Vol.9 No.-
또한 WTO체제의 출범과 한국의 OECD가입을 계기로 한미일 협력관계는 세계 무역과 세계 경제운영을 그 시야에 넣어야 할 것입니다. 이제 우리는 2년만 지나면 21세기를 맞이하게 됩니다. 급변하는 국제상황과 21세기의 동북아 신질서 형성과정에 있어서 한미일관계를 재조명하고 그 역할을 음미하여 새로운 한미일관계의 구축을 냉철하게 검토해야 할 시점에 이르렀다고 생각합니다. 항상 진취적이고 끊임없이 세계로 뻗어나가는 항도 부산에서 오늘의 뜻있는 세미나가 개최되는 것은 시기적으로도 매우 적절하며, 우리 외교정책의 발전을 위하여 유익한 성과 있기를 크게 기대하는 바입니다.
오재희 대한영상의학회 1980 대한영상의학회지 Vol.16 No.2
A radiological and clinical observation was made on 77 cases of benign prostatic hyperplasia admitted to the department of Urology, Cho-Sun University Hospital during the period form January 1972 to December 1979 and following results were obtained. 1. Incidence of PBH was 8.1% to 953 total inpatient , 11.3% to 679 male inpatients, and 34.5% to male inpatients of 50 years more. 2. Majority of cases found in 7th and 8th decades(80.5%) with mean age of 69.4%years old. 3. A gradual tendency of annual increase of the cases was observed and the mean interval elapsed form initial symptoms to visit was 29.9 months. Common symptoms were dysuria in 72 cases(93.5%) , hematuria in 53 cases(68.8%), frequency in 51 cases (66.2%) and 12 cases (15.6%) were acute urinary retention. 4. I.V.P. findings of BPH were elevation of the bladder base in 71 cases (92.2%), trabeculation of the bladder wall in 58 cases (75.3%), hypertrophy of the baldder in 24 cases (31.2%) and the complications-hydrone- hrosis & hydroureter 16 cases (20.8%), bladder diverticula 9 cases (11.7%) and bladder stone were 5 cases(6.5%). 5. Cystourethrographic findings of the posterior urethral with 33 cases of PBH were smooth, gentle sloping in 28 cases ( 84.8%), widening in sagittal plane in 23 cases (69.7%), elongaton & narrowing of the urethra in 26 cases (78.8%).