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한영복,박우찬 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.2
129 cases of diabetic retinopathy were classified into background and proliferative types and type I and type II diabetes. Each case of diabetic retinopathy was analyzed according to the sex, age, duration of diabetes, visual acuity, and complications such as vitreous hemorrhage, tractional retinal detachment, neovascular glaucoma, and macular edema. The results were as follows: 1. Among 129 diabetic retinopathy patients, the incidence of type I was 18.6% and type II was 81.4%, and background retinopathy was 61.2% and proliferative type was 38.8% Type I diabetes was significantly associated with proliferative retinopathy than type II. 2. The peak incidence of diabetic retinopathy was in 6th decade. 3. The incidence of proliferative retinopathy increased with duration of diabetes mellitus. 4. The visual acuity of proliferative retinopathy was significantly worse than that of background retinopathy, and the risk of visual impairment also incresed with duration of diabetes and age at diagnosis of diabetes. 5. The incidence of blindness was 11.6% and the most common cause of blindness was vitreous hemorrhage. 6. The most common complication was vitreous hemorrhage in proliferative retinopathy and cataract in background retinopathy.
한영복,남강현,김성호 한국전자통신학회 2022 한국전자통신학회 논문지 Vol.17 No.4
국내 전력계통에 부하추종운전 중인 가스터빈 발전기들은 정격 주파수 유지에 큰 역할을 하고 있지만 종종 주파수 제어가 불량한 경우도 발생한다. 이에 가스터빈 속도제어 장치인 조속기의 제어 특성을 살펴보고 고장 유형을 분석한 후 사안 별로 대책을 제시하였다. 그리고, 가스터빈은 연료제어의 빠르기에 따라 주파수 회복에는 도움을 되지만 연소실 온도가 급격하게 변동하고 연소진동이 발생하는 등 안정 운전을 저해하는 요소로 작용하기도 한다는 것을 조속기 응동시험을 통해 확인하였다. 따라서, 안정적인 전력품질을 유지하기 위해서는 철저한 설비관리는 물론 전통적인 비례 적분 미분 제어방식과 4차산업의 핵심 분야인 기계학습 알고리즘이 융합된 조속기 제어방식의 연구 필요성이 대두되었다.
한영복 충남대학교 의과대학 지역사회의학연구소 1983 충남의대잡지 Vol.10 No.2
Anterior and posterior vitrectomies were used to treat 33 cases of various ocular diseases including vitreous opacities, ocular trauma and anterior segment diseases. The results are summarized as follows : 1. Vision improved after surgery in 82% of the eyes, was unchanged in 12%, and decreased after surgery in 6%. 2. Anterior segment diseases had improved visual results in all 7 cases and ocular trauma cases had the functional success rate of 82%. Posterior segment diseases had the worse visual results with 57% of operations functionally successful. 3. The operative complications were 2 eyes of vitreous hemorrhage and 1 eye of hyphema. The postoperative complications were 2 eyes of increased intraocular pressure, 1 eye of retinal detachment and 1 eye of vitreous hemorrhage.
한영복 충남대학교 의과대학 지역사회의학연구소 1984 충남의대잡지 Vol.11 No.2
The objective of this study is to compare the results of the twenty-one eyes of central serous choroidopathy which were treated with argon laser photocoagulation with the fourteen eyes which were not treated because the leakage site was located within 230um. of the capillary-free zone. The results are summarized as follows: 1. Average duration of serous detachment was 3. 4 months in the nontreated group and 2.3 months in the argon laser photocoagulated group. Complete recovery as shown by resolution of serous detachment occured at a mean time of 1 month from photocoagulation. 2. Average initial visual acuity was 0. 6 in both the treated and nontreated group, and average final visual acuity was 0. 9 in the treated group and 1. 0 in the nontreated group. 3. There were no complications from photocoagulation in any of the eyes.